I think a major reason behind this problem is that their entire seller system to Add/Edit Amazon product listings (Amazon Seller Central) is run almost entirely

I think a major reason behind this problem is that their entire seller system to Add/Edit Amazon product listings (Amazon Seller Central) is run almost entirely as an outsourced division. The website is entirely different (although Amazon themed/branded). It still doesn't have full mobile support. Phone support is almost non-existent. Most customer support is outsourced to foreign countries. It is a joke. It once took me 3 months of arguing back and forth to get an erroneous $30 seller fee refunded since there was no "supervisor" to speak to and only a broken ticket system where I would received canned apologies and promises - just to have the same result over and over. They are clearly understaffed and/or don't know what they're doing most of the time, so counterfeit, duplicate, and junk/low quality listings get through all the time.