The AP Theory test doesn't really matter in the long run. If you go to a college for music, they'll make you take their own test anyway and place you into a theory depending on what you get on that test.
Good thing none of this is necessary to actually write music, lol.
I -hated- my theory/auditive courses, hated with capital B. I flunked my auditive finals, in fact, har.
But again, good that it's all rather useless in the end.