It is a REALLY bad idea to apply to schools that you wouldn't attend, even if it was the only school you were accepted to. The reason is that, in the following year, when you apply again, those schools that accepted you (but which you rejected) will not accept you again unless you had extraordinary circumstances for rejecting them the first time. Furthermore, other osteo schools will see that you got in the first year but chose not to go (if you got into other osteo schools-at least that's the way it works for allo schools), making them wonder why you didn't go and how committed you really are to medicine. It's simply a bad idea.
A better way is to apply only to the school in which you are interested for the first year. Then, if you don't get in, apply again the second year, in addition to other schools. I bet that once you don't get in the first time, you will be a little more willing to attend a "not first choice" school but a good school nonetheless. And those schools might give you a look since that would be the first time they received an application from you and you wouldn't have rejected them in the past.
Good luck.