Snail Mail strikes again. From it's origination point in Nebraska, to a Regional Center in Kansas, to my home state of Indiana... and back to Kansas? Guess my estimated delivery date is off the table.
We always get sale flyers after the sales have ended. I once received a dental appointment reminder a week after the appointment, so I did a little experiment and mailed a letter to myself. It took 11 days to reach me. Evidently they changed things at the post office and no longer have a box for local mail. All our mail is sent 90 miles north, or 45 miles east to other routing centers.
I like USPS but you are right - they are having a lot of issues right now. I'm waiting on a 2-day priority shipped money order that should have been here Monday. No detailed tracking - its "in route". I think with more things being shipped than before they are just having trouble keeping up (and they're not alone). Where we live FedEx and UPS are still pretty much on time.