Ok, here's my problem. I am quilting a disappearing 9 patch. I am stitching rows across the patchwork part using a guide bar. I decided to see how it looked and spread it across the bed. Lo and behold, looking at the back part of the rows was shorter then the other even tho I started and ended in the same places. I took out part of them and started over and everything is going well. Has anyone ever had this problem?

Suzette