This happens because Amazon allows inventory commingling. For example Amazon has their own, legitimate inventory in a West Coast warehouse, and a third party seller has the same inventory with the original UPC manufacturer bar code on it, sitting in an East Coast warehouse. Amazon considers this 1:1 inventory. Amazon will debit their inventory on the West Coast, and credit the inventory that belongs to the third part…
Our sales figures definitely weren't high. I think it may have been related to how much stock we had for all the sizes of the product.
Soon the product images and descriptions we provided became the canonical version and overrode whatever was there before. Even previous customer reviews from other sellers would continue to be shown on was what now basically our product page.