The backend of amazon is a complete disaster. I wanted to sell my software on amazon and the process of listing it involved filling out an excel spreadsheet and emailing it to a person. Then when I started selling on other platforms and amazon sales dried up, they disabled purchasing because of low sales. They didn't delete the listing, just made it so you couldn't buy it because not enough people were buying it. So people would occasionally search on amazon, find it, be unable to buy it, then email me in confusion.

This was years ago, but not that many years ago. They've only automated and streamlined the high traffic bits of the business, the rest is slapped together with spit and glue.