Why do my orders keep defaulting to an old address?

I dunno if anyone here can help me. I moved a month ago and I changed my address in the app and even deleted the old one, but my orders somehow keep getting shipped to my old address. I even checked the address before I checked out, but just happened to check the tracking and it’s once again going to my old address, so I have to hope it doesn’t get stolen before I can go grab it. How do I stop this from happening, besides deleting my account?