I think this is just a personal preference but when i checked out i paid for UPS. Got my tracking number which is being shipped by USPS. Called and said they do that often and i told them they should probably change their website than.
probably a dumb rant but i guess if anyone else in the future use's them for RO products to just be aware, i wouldn't pay for any of the faster services either as they probably will change it on you.