i only have trouble when a package is from one carrier to anther say fed ex goes so far the lets usps take over .I just had a package sent that way ..
It was super fast with Fedex so close to the final destination to my home (3 days I would of had it) then the package was handed to usps When they got it usps shipped it to Texas..
Then they took 5 days to get it here.. so what would of been 3 day delivery ,turned into a 8 day delivery.. But the Bad part is they damaged the metal display I ordered .. the seller credit me 1/2 of what I paid and I fixed it but makes you wonder what else is going to be the norm for these guys to ship our items...