I've never had anything like this happen to me. Interesting!

I've never gotten an incorrect amount of money but then again I've never used ATMs an a regular basis.

On another note, I did walk up to an indoor ATM (inside the lobby of a building) a few years ago and found several hundred dollars in the slot where money is dispensed. I took it into the bank connected to the lobby (it was their ATM) and turned it in to a teller. The teller called me a little later to let me know that a gentleman came in a few minutes after I left to ask if anyone had turned in ATM money but wasn't really expecting them to tell him 'yes' so he was relieved and thrilled to find out otherwise.

I wish.