So the package was accidently dropped into a CA shipment box.
IF this happened continually, then it is an issue.
A one shot; no big deal.
You are not perfect; how would you expect a government run organization to be.
It's not just USPS, either. I once had a UPS package, that I was really badly wanting to be delivered, make it all the way to the UPS sort facility for Texas, in Mesquite, which usually means you'll get it the next day.
Except, for some unknown reason, it then went to Louisiana (Baton Rouge, I think), where it was caught, and sent back to Mesquite the next day, and delivered to me the day after that, adding 2 days to the delivery time!
When I complained to UPS, they sorta shrugged their shoulders, and said, "We still got it to you in 7 to 10 days, you have nothing to complain about".