People have to STOP saying "Don't blame the post office", and here is why;
To the best of my knowledge, the post office is still charging rates for overnight, express, 2-day, 3-day delivery. They are charging a premium for these services, services that simply do not exist.
If I was on here selling rockets that I didn't have, you would be all over me like stink on a skunk.
Until they get themselves straightened out, they should only sell parcel post, at parcel post rate, with no delivery guarantees whatsoever. That way buyers could make an informed decision between USPO, UPS and Fedex.