True, but we know that inventory commingling is an issue in general for Amazon so it seems reasonable to assume they have done so in this case given that there are two vendors cited who provided strong claims to have been selling proper product, but were still subject to the recall.

I ordered a variety of different products and so I can see which were recalled and which were not. Based on that sample my guess is that they recalled anything with the text "solar eclipse" in the description that they could not conclusively prove complied with the relevant human-eye exposure standards which include manufacturing, documentation and tractability requirements. This would have caught : truly unsafe product; safe product that lacked the necessary paper trail; safe product that wasn't manufactured in the approved facility; product that was never marketed for human eye protection; compliant product that couldn't be separated from the above categories due to Amazon inventory commingling.