Update Values in Excel Data Validation

Hello everyone

I have a problem with the data validation with lists in Excel.
Please have a look at my sample spreadsheet and my code.

The workbook has two sheets: name and customer.

I defined a name (called name) in name and I used data validation with lists in the sheet 'customer'. I set the data validation to accept data from name.only.  So far, so good.

It can happen that I want to change the name of a customer, or whathever is in a name. This is, after all, only an example. Unfortunately, once I've changed the value, it is not automatically updated in the the lists. I have to go through each cell, or in this example: row, that contains data validation/list and change the value manually by selecting it from the pulldown menu. That's ok if I only have a few records, but it will be cumbersome once the spreadsheet is populated with a lot of data.

I decided to write a VBA code which does this job, and it works. I put the code into the worksheet name. But there is a bug: Every time I add a new name in name, the new value is added to the first empty row and each row till number 65536. Annoying.

Any ideas what I'm doing wrong? How would you fix this?

Thanks a lot

Massimo

Option Explicit
Dim strName As String

Private Sub Worksheet_SelectionChange(ByVal Target As Range)
   If Not Intersect(Target, Range("Name")) Is Nothing Then
      If Target.Count = 1 Then strName = Target
   End If
End Sub

Private Sub Worksheet_Change(ByVal Target As Range)
   Dim rngZelle As Range
   Dim strStart As String
   Dim strNeu As String
   If Not Intersect(Target, Range("Name")) Is Nothing Then
      If Target.Count = 1 Then
         strNeu = Target
         With Worksheets("Customer").Columns(1)
            Set rngZelle = .Find(strName, lookat:=xlWhole)
            If Not rngZelle Is Nothing Then
               strStart = rngZelle.Address
               Do
                  .Cells(rngZelle.Row, 1) = strNeu
                  Set rngZelle = .FindNext(rngZelle)
                  If rngZelle Is Nothing Then Exit Do
               Loop While Not rngZelle Is Nothing And rngZelle.Address <> strStart
            End If
         End With
      End If
   End If
   End Sub

Data-Validation.xls
Name.png
dropdown.jpg
Adding-a-new-name1.jpg
Adding-a-new-name2.jpg