I hate when that happens, but I think we have all been there. The kicker is if we don't notice it until it's quilted. When my daughter was going away to college, she wanted to take a quilt with her, she said she didn't want a quilt like any of my quilts. Was there a compliment in there? I doubt it. Anyway she went through my stash cutting up squares, wanting no two squares to be alike. She still hasn't found the one fabric she used twice, and I didn't catch it until I was quilting it; but I never said a thing. Anyway, I rather like your new design element in the quilt.