You know i was having a real problem with my blocks not coming out right and it had nothing to do with my cutting but everything to do with my seam. I was using a 1/4 in foot and I was using that and thinking that all of my seams would be 1/4 inch but they were not. Use the 1/4 inch seam guide on your throat plate of your machine and see if that helps or not. You may also need to put your pinky out on the cutting board when you are cutting. My mom always told me measure twice and cut once. It has truely helped me out a lot. Hope that helps. Jennifer