I agree with contacting the shop and giving them the opportunity to do right by you. If they aren't aware of the problem it gives them the chance to check the fabric before it becomes a problem with many customers. Hopefully they will value you as a customer that's just as important to them as their regulars. Most LS employees are quilter's/sewer's too and can understand the issue at hand.
Good luck,
Andie :D :D :D