First of all 13 quilts does not warrant an excuse of "only" - that is quite the achievement. Good for you. Now for the binding. If you watch 5 binding videos, you will get 5 different ways of attaching it, and your method is one of them. If you are happy with the quality of your stitching, then there is NOTHING wrong with the way you do it. I have 3 different ways to attach binding, and one of them is to bring it to the front and sew it down by machine. Don't let the "YOU MUST DO IT THIS WAY!" rules get you down. Next time, try it the new way and see which one YOU like better.