Man Mr. MD or DO, all I can say is that you are holding a spot that somebody who truly believes in osteopathic medicine could be sitting in. You are blocking them out because you obviously fooled in adcom into believing that you cared about osteopathic medicine when it is only a backup for you. You don't want to be there, so retake your mcat and open the spot for a student who does. And no, I did not apply this year, but I thought I would give my 2 cents.
If this is not the case with you than I apologize, but you also do not need to retake the mcat or hold your spot since you already are accepted to D.O. school.
So, I say, make up your mind, but do not block somebody elses chances. Or, when you interviewed, you should have said"I am not sure if I want to be a D.O." I believe in honesty.