Sorry to hear the troubles you're having Mancoon. After reading the issues you had (and others forum users) with your lithographs, I decided to take another look at my Dishonored prints. On initial inspection, they looked perfect to me, but then I noticed a crease which I didn't notice earlier.
By the looks of it, it seems the crease was caused before the print was packed as it wouldn't be possible when rolled up in the tube. The rest of the print is ok except for a few slight creases which aren't really noticeable. I'm reluctant to request a replacement in case it's worse than this one.
Can creases like this be removed somehow? I've heard dampening the crease with water and using a dry iron can remove creases...