I wonder if the problem is on the step where you fold the binding down with the fold edge even with the top edge? Maybe this isn't leaving enough to fold over and get a point. Try making that fold one inch -- what I mean is follow the same steps as with 1/4 inch binding, but when you stop stitching 1/4 inch away from the edge and fold the binding up, then straight down, rather than line that fold up with the top edge, (1/4 inch again) try having the fold edge 1 inch from the stitching line. Is that clear as mud?! Not sure this will work, but it sounds good to me. If you try it, let us know if it works.