I made several bargello quilts and they are right. Make sure one end of you strips are even as all fabric is not the same length. Sew in groups of two then line them up and sew together from opposite ends. This will prevent the bowing. Also when pressing follow the instructions so that when you cut the strips and sew them back together they will "wiggle" match together nicely. I hope I have not confused your totally one this LOL Marge