I dont hand sew the back binding and I dont use pins.
I use 2 1/2 inch binding and sew to the front of the quilt. Iron the seam open then fold to the back and glue with elmers glue and iron in place.
Use a stitch in the ditch foot to sew from the front in the ditch.
Be sure to square up your quilt first to get an even stitch on the back binding.