I "think" they are sold as "irregulars" since I've seen alot of it that has been given to our babycharity group (the leader may purchase it from some non-descript store or online). It is MISprinted; MISaligned; MISsing design; etc. We still can use it but we try to cut around the "MIStakes".
Rags for some companies... I'm guessing here... it is a shame if they just throw it out.
If we get a professional answer, make sure it's printed here (sorry for the pun! ) Thanks.