Are you trying to make a Sawtooth or Variable star?? When I first started making HST, I found that I was NOT sewing a straight line. Be sure to draw on a line accurately from one point to another. I use sharp pointed lead that mechanical pencils will give you. Start from the beginning and take measurements at ever step you take to find out why you are losing your points. There are so many ways to make HST, you just have to find the method that works best for you.