Yeah, a couple years ago when Southwestern Bell moved all their billing to Dallas, I started getting bills that were MAILED and postmarked AFTER the due date! Not the Post Office's fault. They actually return mail that is metered by the sender with a date before the day they pick it up, because so many companies were doing this so they could blame it on the USPS.
Yeah, they have a REAL competitor, now, Fed Ex ground. Cheaper, more reliable, and very little damage. I've had a LOT of stuff wrecked by UPS.
Jon