This includes the last five months. But, regular as clockwork since January, I call in on the 15th (my payment is due on the 21st) and do my payment. It clears. Then, right around the 5th, I get a letter reminding me I hadn't paid. Around the 6th, I send the letter back attached to a copy of the cancelled check (my credit union puts them all online for easy access).
Then, on the 15th, the cycle repeats itself.
Five months in a row, I've gotten a "reminder" to pay a bill I had already paid. Grr . . . But at least my car is still there every morning when they think I'm a deadbeat. (I don't think they can repo for being allegedly one payment late, anyway.)
(Luckily, I only have 4 payments left, so I won't have to put up with this much longer. But something is clearly screwed up with their computer.)