Keep in mind that amazon has listings per product (vs eBay with listing per product and seller) It is quite likely that original product was fine, that's why a

Keep in mind that amazon has listings per product (vs eBay with listing per product and seller) It is quite likely that original product was fine, that's why all the reviews, but then it got out of stock and new seller brought new product, which was different (by mistake or on purpose) and that one was people complaining about.