First thoughts - is your quilted top trimmed straight, and are the corners trimmed to perfect 90 angles?
Not being the quilt police, but it's hard to get nice straight bindings if this isn't the case.
Try cutting your binding strips 2.5" - if you need an extra little amount of fabric, then give it to yourself.
Or 2-3/8".
Practice on a small quilt sandwich so you can find the correct combination of strip width and seam allowance that works for YOU, and will allow you to comfortably machine sew down the second side as well.
I cut 2" and sew with a 1/4" seam, and that works for me.
My QBFF cuts 2-1/4 because she's happier with the way that looks.
Some people adore Sharon's method and get great results (I'm one of them), and others have found better results with NOT pressing the binding strips in half before sewing to the sandwich.
To each his/her own. ;-)
Last edited by MTS; 02-04-2013 at 02:13 PM.