If you can't decide between that many schools then you shouldn't have applied to that many schools, and I am assuming that there are more schools that you applied to that you didn't get in to. All you are doing, aside from over-doing your safety net, is ruining other peoples chances of getting in. I am sorry if I seem harsh, but this should be a lesson for future generations. High school students should be able to find a balance where they have safety schools, but their not just applying to 15-20 schools.
I realize you only applied to 12, but in my eyes that still pushing it. It's one thing if they are reach schools, but if you have gotten into almost all of them, then they are obviously not.