Over the years I've sent back countless rolls of media, cut stock, cans of ink, printer cartridges ( just returned one to manufacturer, they had a replacement for me next day after call) , it's all part of mass production. I'm positive I've sent out screen printed items that were less than perfect, that's why I always overprint to be safe. You found one ugly coro in a box of one hundred prints? Count your box, I put in 103. I always order one extra shirt in each size for textile runs, I could screw one up or one could come with a hole in it. After a while I get a box of different size and color shirts to set up complex jobs with or make band shirts to toss in the crowd at gigs. Send the roll back for another and keep going. Sometime sooner or later it will happen again and you won't get quite as frazzled.