Alex demonstrated how to do mitered bindings - it's in Season 2, and I think I remember that you need to wait for the DVD's. Anyway, her method works every time. And yes, if you are submitting your quilt for judging, you should sew the corner at both the front and back. My friend recently had hers in the County Fair and got a blue ribbon, but the judge wrote that she should sew the front down, too.