Well it just doesn't work that way. There is nothing that associates a pair of copied CCs.
If you are pasting them to rows as show in your example then perhaps you could use:
Code:
Private Sub Document_ContentControlOnExit(ByVal ContentControl As ContentControl, Cancel As Boolean)
Dim i As Long, StrDetails As String
With ContentControl
If .Title = "Action" Then
For i = 1 To .DropdownListEntries.Count
If .DropdownListEntries(i).Text = .Range.Text Then
StrDetails = Replace(.DropdownListEntries(i).Value, "|", Chr(11))
Exit For
End If
Next
ContentControl.Range.Cells(1).Next.Range.ContentControls(1).Range.Text = StrDetails
End If
End With
End Sub