That's why I said I might be missing something
. As your code stands, if I use the Delete key, I get an error 1004 on the Undo. If I use the Delete icon, I'm okay. But that's fixable. However, if I just type anything the Undo undoes the typing but then deletes the row 

So, if I switch off the event handler for a moment and populate column A with some data, then switch on the event handler, if I type anywhere, the whole row will be deleted. That's because, regardless of what the change is, you have:
I'm thinking that can't be right
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