IIRC isn't another part of that problem the commingling of stock for the "same product" from different Fulfilled by Amazon sources all in the same bin (unless t

IIRC isn't another part of that problem the commingling of stock for the "same product" from different Fulfilled by Amazon sources all in the same bin (unless the vendor pays Amazon more to keep it separate), so you can't tell which vendor fakes come from sometimes?