More on ebay's mysterious authentication program

[paul]

One week ago, I won a 5"x7" Kashin premium on ebay. It is in a PSA holder. Because it cost over $250, I knew the seller was required to send this graded card to ebay's authenticator. Silly, but fine. Well, today I received an email from ebay saying that they could not authenticate the card. According to ebay, the card was "miscategorized" by the seller. But the seller listed the card under Trading Cards / Singles, which seems like the right category to me. This got me wondering what ebay means by "miscategorized". There was no explanation in the email. Does ebay think it's not a card?

Thankfully, ebay is still sending the card to me. They actually apologized for not returning the card to the seller, explaining that the ebay guarantee does not apply to miscategorized items. While I'm glad that I'm getting the card, this also got me wondering whether sellers could bypass ebay's authentication just by listing a card in the wrong category. Any thoughts on this? Thanks.