Ever had a phantom reversal payment on paying a bill online?

Had a scare yesterday where I received a call saying I failed to make my car payment in December. I logged into their online portal to see where I did make the payment yet there was a reversal issue for the same dollar amount on the same day.

I asked the lady on the phone to verify my routing/account info. She said that it wasn't a case of insufficient funds, so we don't know what happened.

She did take the late fee off my bill.