You are not alone in having this problem. It can be very frustrating. I now check to see if I have a V after every couple of cuts. If I find I'm having a V, I re-straighten my fabric. Because now straightening my fabric results in the edges not being evern, make the next cut about 1/4 of an inch wider, then trim back that strip back to the correct size. Yes, it does waste a tiny bit of fabric, but it works for me.