proof images vs printed images

i recently ordered a sticker sheet from you guys hoping it would be the same great quality of the individual stickers I've ordered many times before. The proof looked great when I reviewed them, nicely spaced and very sharp. But when i received them in the mail, all the images were blurry when printed. You already had two of the images from my previous orders, those individual stickers are very sharp. when compared to the sticker sheet there is a definite difference in image quality. not sure how that happens but these images are much blurrier than the individual stickers i already had. same for the rest of the images on the sticker sheet which are from the exact same camera and have the same quality. Quite disappointing as i was hoping to use these for business purposes, but not sure I want to if the images do not match what I already have.