I just had to take out a strip between my French Braid quilt because I cut the strip 2 1/2 inches too long!!!! It was so ripply and I didn't notice until I took to the LA person. It was finished so I had all my borders on also! I knew I would never be happy with it that way so came home, took out all 4 seams, re-measured and cut to CORRECT length and sewed it back into place. It is flat now, thank goodness!!!! You aren't alone in making errors!!!!!!