I actually bought the card raw and submitted it at a show with a few other raw D304s. I never noticed it. Hard to blame the TPG since I knew what card I was buying. The seller might have mentioned it to me and not sold it at market price but that's another issue.
I'm not going to go to the TPG and demand money based on them missing the same thing I did. I don't even care to mention which TPG because I'm not interested in that debate. I'm also not going back to the seller. Maybe he didn't notice either, maybe he did. Either way, I don't see the point. Also, I did buy the card and not the holder but in this case but was more concerned with the back actually, since it is a Martens back which is fairly rare for this card.