Is there a trick to putting on binding by machine? I have a special foot for my machine. When you bring the binding to the front, all you're supposed to do is follow along your stitching line and it stitches close to the edge of the binding (on the front.) But, on the back, it doesn't stay consistent. The stitches will be slightly on the binding for a while then they will be on the quilt. What am I doing wrong? Thanks!