I always square up my quilt when I get it back from the quilter's and see that she's sewn a line about 1/16" all around the outside of the quilt and I usually have to cut a lot of it off to square it up. I don't sew it back down. I just bind it as usual. But I do sew my binding together so they don't drift apart when sewing. I learned that trick a few years ago and it's made a world of difference. Takes a little extra time, but it's so worth it. I sew 1/8" of the raw edge of the binding edges to each other before sewing them to the quilt.