ok maybe it's this. You know the part where you get to the corner, stitch until you're 1/4" away (or whatever the seam allowance is ??) and then turn the binding up and then back down to make the corner? That fold in the binding-I've heard it should be flush with the edge, or just a tad below the edge. Which is your preferred method? Could that be my problem that I'm not making the fold be in the right place?