Amazon commingles inventory, so if there were any other sellers of the item, you get an item from a random seller, not necessarily an item that was provided by the seller you purchased from.
The thing is, the commingled stickerless inventory program is only supposed to apply to items sold by Amazon, not to third parties like AnkerDirect, so the hypothesis it's fulfilled-by-Amazon that screwed the pooch is more likely.
That would cut down on the number of shitty dangerous power suppliers they're selling.
Certifications from UL or similar labs are much better, but many producers don't hesitate to also fake the UL logo on their fake products.