And if above tips don't help, glue baste! On the ironing board, line up the seams and pin. When satisfied that they match, put a small drop of glue in the seam allowance where they match and touch the iron to the seam allowance for a few seconds to dry the glue. I use Elmer's washable school glue. When your quilt is done and washed, the glue is gone. If the seams are matched when glued, they aren't moving while stitching.