There is always a way to do things in the military. Trouble is finding out how. Don't listen to "barracks lawyers" who don't really know what they're talking about. Next drill, ask to visit personnel and ask your question there. If you were AF Reserve, I could tell you exactly what office to seek at personnel. Army has different terminology, but whatever the personnel function is called is where the folks who can help you out are.

Word of advice. When asking how to shorten your enlistment, be careful how you act and mind your military bearing, because news always seems to have a way of finding it's way back to your First Sergeant.