I am assuming that the method you are talking about is joining the two ends of the binding with a seam before it is attached to the quilt. when I have tried this I was not happy with the results for the same reason. I start my binding with a good 1/2 inch folded back like a seam allowance on a bias angle. Then I attach the balance of the binding to over lap my seam allowance at the start, fold back as before and finish. Then I hand stitch the join before turning the binding to finish.