>I have not looked through that code yet to see what other behaviours that might trigger. Adding code into AddAfterAppendBlank() seemed to work flawlessly. Maybe someone who knows if I can monkey with .iaDataEntryGrids can pipe in here to let me know if I am asking for trouble.

If AddAfterAppendBlank() does the trick, I'd stay with that. That way if a future update messes with the array functionality, you don't get bit in the back end.