It's likely an issue with the volume of items for sale. What likely happens is they upload an item with multiple variations (think colours of a shirt). One of

It's likely an issue with the volume of items for sale. What likely happens is they upload an item with multiple variations (think colours of a shirt). One of the variations is a completely different product. They buy some reviews for the shirt and then remove those from the listing, leaving only the other random product. This happens on Aliexpress all the time. The idea is that they put up a super cheap item ($0.99 iPhone cables), get a ton of sales, some good reviews then swap it out for a more expensive item. Sales rank and reviews stay, and the new more expensive item gets that data. The new item will be much higher margin and/or will never arrive (they just take the money and run).