repetitions in the "combobox" why?

[inactiveUser214710]

hi everyone
In my exemplification project I have two option box(opt1;opt2); two checkboxes(chk1;chk2) and a combobox(cbo1).
I have: A macro (rng) for checkbox1 and (rng2) for checkbox2.
When I choose opt1 and chk1, cbo1 shows the correct information, but when I change the option in checkbox the combo show repetations. Why?
There are something wrong, please help me to solve. thank you

Private Sub chk1_Click()

If chk1.Value = True And chk2.Value = False Then
  rng     

End If
End Sub

Private Sub chk2_Click()

If chk2.Value = True Or chk1 - Value = False Then
  rng2     

End If
End Sub

=macros
Sub rng()

Dim rngCaixa As Range
Dim ws As Worksheet

  Set ws = Worksheets("sheet1")
For Each rngCaixa In ws.Range("caixa") 'range manager
  UserForm1.cbo1.AddItem rngCaixa.Value
  
Next rngCaixa

End Sub

Sub rng2()

Dim rngbanco As Range
Dim ws As Worksheet

  Set ws = Worksheets("sheet1")
For Each rngbanco In ws.Range("banco") 'range manager
  UserForm1.cbo1.AddItem rngbanco.Value
  
Next rngbanco

End Sub

 

[Fluff]

Add this line to the top of both rng subs

UserForm1.cbo1.Clear

 

[inactiveUser214710]

Add this line to the top of both rng subs

UserForm1.cbo1.Clear

hi Fluff
Perfect, Solve
Thank you very much
Jdcar

 

[Fluff]

Glad to help & thanks for the feedback