Help when running code formulas on cells and in names define are changing

Hi guys

I have a code (thanks to the fantastic members here), and i dont know if its a problema with it or normal excel behaviour.
This is one part of the code in the sheet:

Private Sub Worksheet_Change(ByVal Target As Range)
  Dim FiltCrit As String, myComboVal As String
  Dim Rng As Range, Rng1 As Range, myCells As Range
  Dim LR As Long, cNo As Long, x As Long
  If Target.Cells.Count > 1 Or IsEmpty(Target) Then GoTo ExitSub
  If Target.Address = "$L$4" Then
  Application.EnableEvents = False
    With ActiveSheet
    .UsedRange.Offset(0, 68).ClearContents
      LR = .Cells.Find("*", .Cells(.Rows.Count, .Columns.Count), SearchOrder:=xlByRows, _
          SearchDirection:=xlPrevious).Row
      If Not .AutoFilterMode Then
        .Range("AA3:BI3").AutoFilter
      End If
      .Range(.Range("X4"), .Range("Y4").End(xlDown)).ClearContents
      FiltCrit = .Range("L4").Value
      With ActiveSheet.Shapes("Drop Down 3").ControlFormat
        myComboVal = .List(.Value)
      End With

      Select Case myComboVal
      Case "ZT/Feeder A1"
        cNo = 2
        .Range("AA3:BI3").AutoFilter Field:=cNo, Criteria1:=FiltCrit

        Set Rng = .AutoFilter.Range
        x = Rng.Columns(2).SpecialCells(xlCellTypeVisible).Count - 1
        If x >= 1 Then
          Set Rng = .Range(.Cells(4, 29), .Cells(LR, 29)).SpecialCells(xlCellTypeVisible)
          Set Rng1 = .Range(.Cells(4, 27), .Cells(LR, 27)).SpecialCells(xlCellTypeVisible)
          Set myCells = Union(Rng, Rng1)
        Else
          MsgBox "A Referência " & FiltCrit & " não existe em " & myComboVal
          .ShowAllData
          GoTo ExitSub
        End If
        
        myCells.Copy .Range("X4")
        

      Case "Arca A1"
        cNo = 2
        .Range("AA3:BI3").AutoFilter Field:=cNo, Criteria1:=FiltCrit

        Set Rng = .AutoFilter.Range
        x = Rng.Columns(2).SpecialCells(xlCellTypeVisible).Count - 1
        If x >= 1 Then
          Set Rng = .Range(.Cells(4, 30), .Cells(LR, 30)).SpecialCells(xlCellTypeVisible)
          Set Rng1 = .Range(.Cells(4, 27), .Cells(LR, 27)).SpecialCells(xlCellTypeVisible)
          Set myCells = Union(Rng, Rng1)
        Else
          MsgBox "A Referência  " & FiltCrit & " não existe em " & myComboVal
          .ShowAllData
          GoTo ExitSub
          
        End If
        
        myCells.Copy .Range("X4")
        

      Case "Feeder B1"
        cNo = 10
        .Range("AA3:BI3").AutoFilter Field:=cNo, Criteria1:=FiltCrit

        Set Rng = .AutoFilter.Range
        x = Rng.Columns(2).SpecialCells(xlCellTypeVisible).Count - 1
        If x >= 1 Then
          Set Rng = .Range(.Cells(4, 37), .Cells(LR, 37)).SpecialCells(xlCellTypeVisible)
          Set Rng1 = .Range(.Cells(4, 27), .Cells(LR, 27)).SpecialCells(xlCellTypeVisible)
          Set myCells = Union(Rng, Rng1)
        Else
          MsgBox "A Referência " & FiltCrit & " não existe em " & myComboVal
          .ShowAllData
          GoTo ExitSub
        End If
        
        myCells.Copy .Range("X4")
        

      Case "Arca B1"
        cNo = 10
        .Range("AA3:BI3").AutoFilter Field:=cNo, Criteria1:=FiltCrit

        Set Rng = .AutoFilter.Range
        x = Rng.Columns(2).SpecialCells(xlCellTypeVisible).Count - 1
        If x >= 1 Then
          Set Rng = .Range(.Cells(4, 38), .Cells(LR, 38)).SpecialCells(xlCellTypeVisible)
          Set Rng1 = .Range(.Cells(4, 27), .Cells(LR, 27)).SpecialCells(xlCellTypeVisible)
          Set myCells = Union(Rng, Rng1)
        Else
          MsgBox "A Referência " & FiltCrit & " não existe em " & myComboVal
          .ShowAllData
          GoTo ExitSub
        End If
        
        myCells.Copy .Range("X4")
        
        
      Case "Feeder B2"
        cNo = 13
        .Range("AA3:BI3").AutoFilter Field:=cNo, Criteria1:=FiltCrit

        Set Rng = .AutoFilter.Range
        x = Rng.Columns(2).SpecialCells(xlCellTypeVisible).Count - 1
        If x >= 1 Then
          Set Rng = .Range(.Cells(4, 40), .Cells(LR, 40)).SpecialCells(xlCellTypeVisible)
          Set Rng1 = .Range(.Cells(4, 27), .Cells(LR, 27)).SpecialCells(xlCellTypeVisible)
          Set myCells = Union(Rng, Rng1)
        Else
          MsgBox "A Referência " & FiltCrit & " não existe em " & myComboVal
          .ShowAllData
          GoTo ExitSub
        End If
        
        myCells.Copy .Range("X4")
        
        
      Case "Arca B2"
        cNo = 13
        .Range("AA3:BI3").AutoFilter Field:=cNo, Criteria1:=FiltCrit

        Set Rng = .AutoFilter.Range
        x = Rng.Columns(2).SpecialCells(xlCellTypeVisible).Count - 1
        If x >= 1 Then
          Set Rng = .Range(.Cells(4, 41), .Cells(LR, 41)).SpecialCells(xlCellTypeVisible)
          Set Rng1 = .Range(.Cells(4, 27), .Cells(LR, 27)).SpecialCells(xlCellTypeVisible)
          Set myCells = Union(Rng, Rng1)
        Else
          MsgBox "A Referência " & FiltCrit & " não existe em " & myComboVal
          .ShowAllData
          GoTo ExitSub
        End If
        
        myCells.Copy .Range("X4")
        
        
      Case "Feeder B3"
        cNo = 16
        .Range("AA3:BI3").AutoFilter Field:=cNo, Criteria1:=FiltCrit

        Set Rng = .AutoFilter.Range
        x = Rng.Columns(2).SpecialCells(xlCellTypeVisible).Count - 1
        If x >= 1 Then
          Set Rng = .Range(.Cells(4, 43), .Cells(LR, 43)).SpecialCells(xlCellTypeVisible)
          Set Rng1 = .Range(.Cells(4, 27), .Cells(LR, 27)).SpecialCells(xlCellTypeVisible)
          Set myCells = Union(Rng, Rng1)
        Else
          MsgBox "A Referência " & FiltCrit & " não existe em " & myComboVal
          .ShowAllData
          GoTo ExitSub
        End If
        
        myCells.Copy .Range("X4")
        
        
      Case "Arca B3"
        cNo = 13
        .Range("AA3:BI3").AutoFilter Field:=cNo, Criteria1:=FiltCrit

        Set Rng = .AutoFilter.Range
        x = Rng.Columns(2).SpecialCells(xlCellTypeVisible).Count - 1
        If x >= 1 Then
          Set Rng = .Range(.Cells(4, 44), .Cells(LR, 44)).SpecialCells(xlCellTypeVisible)
          Set Rng1 = .Range(.Cells(4, 27), .Cells(LR, 27)).SpecialCells(xlCellTypeVisible)
          Set myCells = Union(Rng, Rng1)
        Else
          MsgBox "A Referência " & FiltCrit & " não existe em " & myComboVal
          .ShowAllData
          GoTo ExitSub
        End If
        
        myCells.Copy .Range("X4")
        
        
      Case "Feeder B4"
        cNo = 19
        .Range("AA3:BI3").AutoFilter Field:=cNo, Criteria1:=FiltCrit

        Set Rng = .AutoFilter.Range
        x = Rng.Columns(2).SpecialCells(xlCellTypeVisible).Count - 1
        If x >= 1 Then
          Set Rng = .Range(.Cells(4, 46), .Cells(LR, 46)).SpecialCells(xlCellTypeVisible)
          Set Rng1 = .Range(.Cells(4, 27), .Cells(LR, 27)).SpecialCells(xlCellTypeVisible)
          Set myCells = Union(Rng, Rng1)
        Else
          MsgBox "A Referência " & FiltCrit & " não existe em " & myComboVal
          .ShowAllData
          GoTo ExitSub
        End If
        
        myCells.Copy .Range("X4")
        
        
      Case "Arca B4"
        cNo = 19
        .Range("AA3:BI3").AutoFilter Field:=cNo, Criteria1:=FiltCrit

        Set Rng = .AutoFilter.Range
        x = Rng.Columns(2).SpecialCells(xlCellTypeVisible).Count - 1
        If x >= 1 Then
          Set Rng = .Range(.Cells(4, 47), .Cells(LR, 47)).SpecialCells(xlCellTypeVisible)
          Set Rng1 = .Range(.Cells(4, 27), .Cells(LR, 27)).SpecialCells(xlCellTypeVisible)
          Set myCells = Union(Rng, Rng1)
        Else
          MsgBox "A Referência " & FiltCrit & " não existe em " & myComboVal
          .ShowAllData
          GoTo ExitSub
        End If
        
        myCells.Copy .Range("X4")
        
        
      Case "Feeder C1"
        cNo = 27
        .Range("AA3:BI3").AutoFilter Field:=cNo, Criteria1:=FiltCrit

        Set Rng = .AutoFilter.Range
        x = Rng.Columns(2).SpecialCells(xlCellTypeVisible).Count - 1
        If x >= 1 Then
          Set Rng = .Range(.Cells(4, 54), .Cells(LR, 54)).SpecialCells(xlCellTypeVisible)
          Set Rng1 = .Range(.Cells(4, 27), .Cells(LR, 27)).SpecialCells(xlCellTypeVisible)
          Set myCells = Union(Rng, Rng1)
        Else
          MsgBox "A Referência " & FiltCrit & " não existe em " & myComboVal
          .ShowAllData
          GoTo ExitSub
        End If
        
        myCells.Copy .Range("X4")
        
        
      Case "Arca C1"
        cNo = 27
        .Range("AA3:BI3").AutoFilter Field:=cNo, Criteria1:=FiltCrit

        Set Rng = .AutoFilter.Range
        x = Rng.Columns(2).SpecialCells(xlCellTypeVisible).Count - 1
        If x >= 1 Then
          Set Rng = .Range(.Cells(4, 55), .Cells(LR, 55)).SpecialCells(xlCellTypeVisible)
          Set Rng1 = .Range(.Cells(4, 27), .Cells(LR, 27)).SpecialCells(xlCellTypeVisible)
          Set myCells = Union(Rng, Rng1)
        Else
          MsgBox "A Referência " & FiltCrit & " não existe em " & myComboVal
          .ShowAllData
          GoTo ExitSub
        End If
        
        myCells.Copy .Range("X4")
        
        
      Case "Feeder C2"
        cNo = 30
        .Range("AA3:BI3").AutoFilter Field:=cNo, Criteria1:=FiltCrit

        Set Rng = .AutoFilter.Range
        x = Rng.Columns(2).SpecialCells(xlCellTypeVisible).Count - 1
        If x >= 1 Then
          Set Rng = .Range(.Cells(4, 57), .Cells(LR, 57)).SpecialCells(xlCellTypeVisible)
          Set Rng1 = .Range(.Cells(4, 27), .Cells(LR, 27)).SpecialCells(xlCellTypeVisible)
          Set myCells = Union(Rng, Rng1)
        Else
          MsgBox "A Referência " & FiltCrit & " não existe em " & myComboVal
          .ShowAllData
          GoTo ExitSub
        End If
        
        myCells.Copy .Range("X4")
        
        
      Case "Arca C2"
        cNo = 30
        .Range("AA3:BI3").AutoFilter Field:=cNo, Criteria1:=FiltCrit

        Set Rng = .AutoFilter.Range
        x = Rng.Columns(2).SpecialCells(xlCellTypeVisible).Count - 1
        If x >= 1 Then
          Set Rng = .Range(.Cells(4, 58), .Cells(LR, 58)).SpecialCells(xlCellTypeVisible)
          Set Rng1 = .Range(.Cells(4, 27), .Cells(LR, 27)).SpecialCells(xlCellTypeVisible)
          Set myCells = Union(Rng, Rng1)
        Else
          MsgBox "A Referência " & FiltCrit & " não existe em " & myComboVal
          .ShowAllData
          GoTo ExitSub
        End If
        
        myCells.Copy .Range("X4")
        
        
      Case "Feeder C3"
        cNo = 33
        .Range("AA3:BI3").AutoFilter Field:=cNo, Criteria1:=FiltCrit

        Set Rng = .AutoFilter.Range
        x = Rng.Columns(2).SpecialCells(xlCellTypeVisible).Count - 1
        If x >= 1 Then
          Set Rng = .Range(.Cells(4, 60), .Cells(LR, 60)).SpecialCells(xlCellTypeVisible)
          Set Rng1 = .Range(.Cells(4, 27), .Cells(LR, 27)).SpecialCells(xlCellTypeVisible)
          Set myCells = Union(Rng, Rng1)
        Else
          MsgBox "A Referência " & FiltCrit & " não existe em " & myComboVal
          .ShowAllData
          GoTo ExitSub
        End If
        
        myCells.Copy .Range("X4")
        
        
      Case "Arca C3"
        cNo = 33
        .Range("AA3:BI3").AutoFilter Field:=cNo, Criteria1:=FiltCrit

        Set Rng = .AutoFilter.Range
        x = Rng.Columns(2).SpecialCells(xlCellTypeVisible).Count - 1
        If x >= 1 Then
          Set Rng = .Range(.Cells(4, 61), .Cells(LR, 61)).SpecialCells(xlCellTypeVisible)
          Set Rng1 = .Range(.Cells(4, 27), .Cells(LR, 27)).SpecialCells(xlCellTypeVisible)
          Set myCells = Union(Rng, Rng1)
        Else
          MsgBox "A Referência " & FiltCrit & " não existe em " & myComboVal
          .ShowAllData
          GoTo ExitSub
        End If
        
        myCells.Copy .Range("X4")
        
        
        
      End Select
      .ShowAllData
    End With
  End If
ExitSub:    Application.EnableEvents = True: Application.CutCopyMode = False
ActiveSheet.Shapes("Drop Down 3").Select: Selection.Height = 24
Range("L4").Activate
End Sub

The other part is this one on module:

Option Explicit

Sub teste()
Dim lastrow&, firstrow&, currentdate As Date
Application.ScreenUpdating = False
lastrow = Cells(Rows.Count, "X").End(xlUp).Row
firstrow = lastrow
currentdate = Cells(lastrow, "X")
While firstrow > 1
  If currentdate - Cells(firstrow, "X") <= 1 Then
    currentdate = Cells(firstrow, "X")
    firstrow = firstrow - 1
  Else
    Columns("BQ:BR").Insert shift:=xlToRight
    Range(Cells(firstrow + 1, "X"), Cells(lastrow, "Y")).Cut Range("BQ2")
    lastrow = firstrow
    currentdate = Cells(firstrow, "X")
  End If
Wend
End Sub

Everything is working ok until when i press the button to run the second code that divide all data in periods of time. When i run it, some formulas that i have in cells related to the range (that is beeing populated by this second code) changes the location automatic just like some names with a offset formula to those ranges are changing too.

Is there a way to avoid this but keeping the code running like it is? (just correcting this annoying problem)

Thanks in advance

So i think that i find the problema.
The second code is shifting the data to the right and every time it does that all my formulas are shifting too, just like the offsets that i have in the Names (define names).
Is there anything that could be done in the code to avoid the changes in the formulas and names?

Thanks in advance.

Anyone please