I use 2 1/4" binding too but I put it on differently. I stitch it to the back of the quilt first with about a 3/8" seam. Then flip it over to the front and sew it with an adjustable zipper foot. I hold 2-3" inches in place, with the edge just a hair over the seam line and sew the few inches, stop and place the next few inches, sew, etc. It tends to go fast when you get going, I'm always finished sooner than I thought I'd be. and I don't have all that extra binding outside of the seam.
Cari