“Check to make sure UPS isn’t handing it off to the USPS.
The USPS has lost 3 of our packages and delivers the rest 3-4 days later. “
Yes, and while I don’t fully understand the connections, both UPS and FedEX are kissing ass with the USPS, and the resultant delivery process is seldom done within the time the original shipper designated. Probably a result of worthless, overpaid, unionized government employees. I would go for a Constitutional Amendment that would shutter the USPS.
My sister never had a problem with deliveries from Amazon — until she signed up for Prime. Were so many different issues I can’t name them all. It was a mess. Not sure if it ever improved, but for a couple months it was a nightmare.