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Those were once simple print errors that were commonly considered junk to most collectors. However, Thomas NNOF, 82 Topps blackless, Alex Gordon cut out and a few others have made all of those "potential" gold mines.
Now any sort of freak printing or cutting error is considered a possible variation.
Printing error
Yea, I think they are just printing errors. I don't think they are any short prints because it really makes the name hard to read and a bad look for the cards.