Multiple Loops in a do until?

Afternoon all - please help!! :-)

We are looking for a script to search a worksheet for an entry which matches the textbox.

There could be multiple entries which match on the spreadsheet, so we need to ask if they want to keep the current entry. If yes we need it to start searching for th enext one, if no we are just over writing. We get it to work with one entry, but not with more than one - Can anyone help please? (Excuse the pig's ear of a code, we're just beginners, but it's working so far!!)

Set ws = Worksheets("Future Changes")
irow = 1
'find first empty row on check sheet and then transfers inputs to row
'irow = ws.Cells(Rows.Count, 2).End(xlUp).Offset(1, 0).Row
Sheets("Future Changes").Select

Do Until ws.Cells(irow, 1) = ""

If Staff = CStr(Cells(irow, 1)) Then
MsgBox "A future change " & (cboChange.Text) & " exists for this staff member, press ok to view this change", vbOKOnly
Reply = MsgBox("The existing change is as follows :" & vbNewLine & "Staff No: " & txtStaffNo & vbNewLine & "Name: " & txtFirstName & " " & txtSurname & vbNewLine & "Office: " & cboOffice & " " & cboGrade & vbNewLine & "Working Pattern: " & cboWorkingPattern & " Hours: " & txtHours & " Weeks: " & txtWeeks & " WTE: " & txtWte & vbNewLine & "Notes: " & txtNotes & vbNewLine & "Date Change Effective from " & ws.Cells(i, 12) & vbNewLine & "***If you wish to keep the above change and add a second change for the staff member click yes***" & vbNewLine & "+++If you wish to replace the change shown above with the one you have just entered, please click No+++", vbYesNo)
If Reply = 6 Then


Set ws = Worksheets("Future Changes")
irow = 1
'find first empty row on check sheet and then transfers inputs to row
irow = ws.Cells(Rows.Count, 2).End(xlUp).Offset(1, 0).Row


Do Until ws.Cells(irow, 1) = ""
irow = irow + 1
Loop

Reply = MsgBox("Are you sure you wish to save these changes?", vbYesNo)
If Reply = 6 Then

ws.Cells(irow, 1) = txtStaffNo
ws.Cells(irow, 2) = cboOffice
ws.Cells(irow, 3) = txtFirstName
ws.Cells(irow, 4) = txtSurname
ws.Cells(irow, 5) = cboWorkingPattern
ws.Cells(irow, 6) = txtHours
ws.Cells(irow, 7) = txtWeeks
ws.Cells(irow, 8) = txtWte
ws.Cells(irow, 9) = cboGrade
ws.Cells(irow, 10) = txtNotes
ws.Cells(irow, 11) = cboChange
ws.Cells(irow, 12) = txtDate
ws.Cells(irow, 13) = Delete

Saved = "Yes"

Reply = MsgBox("Your record has now been saved, do you wish to make further changes?", vbYesNo)
If Reply = 6 Then
ThisWorkbook.Save
Unload Me
frmStipInput.Show
Else
ThisWorkbook.Save
ThisWorkbook.Close
End If
End If
Else

ws.Cells(irow, 1) = txtStaffNo
ws.Cells(irow, 2) = cboOffice
ws.Cells(irow, 3) = txtFirstName
ws.Cells(irow, 4) = txtSurname
ws.Cells(irow, 5) = cboWorkingPattern
ws.Cells(irow, 6) = txtHours
ws.Cells(irow, 7) = txtWeeks
ws.Cells(irow, 8) = txtWte
ws.Cells(irow, 9) = cboGrade
ws.Cells(irow, 10) = txtNotes
ws.Cells(irow, 11) = cboChange
ws.Cells(irow, 12) = txtDate
ws.Cells(irow, 13) = Delete

Saved = "Yes"
Reply = MsgBox("Your record has now been saved, do you wish to make further changes?", vbYesNo)
If Reply = 6 Then
ThisWorkbook.Save
Unload Me
frmStipInput.Show
Else
ThisWorkbook.Save
ThisWorkbook.Close
End If
End If

End If

irow = irow + 1
Loop

If Saved = "Yes" Then
Unload Me
frmStipInput.Show
Else

irow = 1
'find first empty row on check sheet and then transfers inputs to row
irow = ws.Cells(Rows.Count, 2).End(xlUp).Offset(1, 0).Row


Do Until ws.Cells(irow, 1) = ""
irow = irow + 1
Loop

Reply = MsgBox("Are you sure you wish to save these changes?", vbYesNo)
If Reply = 6 Then

ws.Cells(irow, 1) = txtStaffNo
ws.Cells(irow, 2) = cboOffice
ws.Cells(irow, 3) = txtFirstName
ws.Cells(irow, 4) = txtSurname
ws.Cells(irow, 5) = cboWorkingPattern
ws.Cells(irow, 6) = txtHours
ws.Cells(irow, 7) = txtWeeks
ws.Cells(irow, 8) = txtWte
ws.Cells(irow, 9) = cboGrade
ws.Cells(irow, 10) = txtNotes
ws.Cells(irow, 11) = cboChange
ws.Cells(irow, 12) = txtDate
ws.Cells(irow, 13) = Delete

Saved = "Yes"

Reply = MsgBox("Your record has now been saved, do you wish to make further changes?", vbYesNo)
If Reply = 6 Then
ThisWorkbook.Save
Unload Me
frmStipInput.Show
Else
ThisWorkbook.Save
ThisWorkbook.Close
End If
End If
End If
End If
End If

Look at the Find and FindNext methods.