Tracking USPS Signature Delivery mail- WTF???

Car Nut said

I had that happen to me, my part showed going to a different state two or three times. I called USPS and they told me that it’s was in a tote that was traveling all over, I got my part the very next day. The tote that my part was in kept traveling all over, but my part was separate all along.

Click to expand...

BINGO!
With USPS tracking, after it leaves your hands with an acceptance scan, any tracking you see afterwards is the APC (container) it either is or was traveling in. Lot of times it's an entire truck or plane load.
Most of the time a letter won't individually be touched again until it hits the carriers hands.