I always bind my quilts by machine. I use a much larger strip than you do, usually 3 1/4 in. I sew the binding for about a foot then I test it to see if it is going to fold over enough. If it is to much or not enough then I adjust my seam allowance accordingly. After the binding is on then I press. I press it over on the front then I turn the quilt over and press it over on the back. I make sure there is enough for stitching in the ditch. I press until there is a nice neatly pressed folded binding. I only pin the corners. Then I stitch in the ditch. I only miss the binding rarely. The back is not perfectly straight but the front looks beautiful. When you wash the quilt the binding will puff up from the pressing. I love this method of binding. It works perfectly for me. I love doing binding, but the secret is in the pressing.