h4auto, If I understand, you didn't look at the front and back of the cards you were purchasing to make sure the cards were what you were getting. You only looked at the thumbs. I know there are errors with the wrong card being in the wrong place (year, team, person, etc), but just by looking at the name on the card and year with their LARGE scans, one should be able to see what is what. This is also why they have the links to tell them what is wrong. I know COMC will take the cards back and refund you and give the cards back to the seller so you should be good if you contact them. This seems like a problem to take up with them and not on the boards.
I've contacted them before when I got something that was listed and priced incorrectly and they refunded me and gave the card back to the seller to fix. I have had my own cards listed incorrectly and had them fix the issue so they were correct.
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Need & Want are 2 different things