I had this happen a couple of times with Amazon.com. Despite changing my default address when I moved and checking that it was correct before check-out, stuff still got sent to my work address, which was OK but a hassle because the mail room did not appreciate getting a big box. Amazon apologized but it happened twice before somehow mysteriously correcting itself. I have also had this happen with merchants who use PayPal and let PayPal choose the address to send it to despite the address you choose or type in when you check out. I ordered something for my Dad and wanted it sent to him directly. I made sure my default address with my account on the merchant site was not checked and I entered his address instead. Everything looked fine all the way through. Then it got sent to me instead. When I called them they said it defaulted to whatever my default address was with PayPal. That was a huge hassle for me because it was a TV set and I had to drive it 100 miles to give it to my Dad. Now I am wary of using PayPal on certain sites.