Can only read value from *some* listboxes

So I have a form that simplifies the process of entering in systematic information. The form consists of 3 listboxes, a textbox and a few buttons. It works fine if the user clicks on each listbox, and then on the "OK" button.

I also want to provide a radiobutton that pre-populates each control (there's basically one combination that's popular, so the radiobutton saves time and maximizes consistency). All the controls get properly selected..... but I can only get values from 2 of the listboxes... one of them only gets a value if a user CLICKS on it... otherwise it keeps value=""

No multi-select issues or complex stuff... this should be super simple... What gives?

Probably easiest to understand if you look at the file HERE: bug.xls

CODE BELOW:

Option Explicit

Private Sub CommandButton1_Click()
    ActiveCell.Value = _
    Left(Me.ListBox1.Value, 1) & _
    Left(Me.ListBox3.Value, 1) & _
    Left(Me.ListBox2.Value, 1) & "|" & _
    Me.TextBox1.Value
Unload Me
End Sub

Private Sub OptionButton1_Click()

    Me.ListBox1.ListIndex = 2
    Me.ListBox2.ListIndex = 0
    Me.ListBox3.ListIndex = 1
    Me.TextBox1.Value = "TEST"
    Me.CommandButton1.SetFocus
End Sub

Private Sub userform_activate()
    With Me.ListBox1
        .AddItem "A1"
        .AddItem "B2"
        .AddItem "C3"
    End With
    With Me.ListBox2
        .AddItem "Y"
        .AddItem "N"
    End With
    With Me.ListBox3
        .AddItem "1 "
        .AddItem "2 "
        .AddItem "3 "
    End With
End Sub