So, I feel really stupid, or they changed the Tiki dress slightly. I just noticed tonight that the straps have 2 button holes, so that you can adjust the length. I ordered one from the
Shop Disney (not parks app) and got it last week. I guess I never saw the buttons, since they are at the back of the dress. When I tried the dress on at the store, I didn't notice them either. It was too big anyway. So, keep that in mind.