Richie,
Her reactions are normal in the sense that this is all very shocking to her. She is going to over react and react erratically until she can figure out how to deal with all this. Once her emotions calm down, I would suspect that you should be able to deal with her along the reasonable boundaries that are finally established.
You are beyond her control. The control she thought she had, was obviously false. She is trying to figure out how to re-establish control. That is what this is all about. That is what cults are all about, so that is what mom is all about.
For your own sanity, I would suggest controlling every aspect of your environment that you can. Really think about what is in your control. Even minor things like your sock drawer. You will be amazed how much good this will do for your morale.
The situation of her taking your money seems awfully odd. You might ask her how you are ever to leave if you are not allowed to save any money. You probably thought of that. The thing is, as offensive as your presence is, she isn't going to want you to leave. You will be completely out of her control at that point. Cults never want people to leave, so your mom won't want you to leave.
And I gotta ask dude, where the hell is your old man in all this? I figured he never pushed you because he didn't want to alienate you. But now that your non-dub status is publicly known, I figured he would stand up for you a little more. I don't get it. Could you call on him for some help here? Could you try to sit down together as your mother's emotions subside, and with your dad as referee, try to figure out what control you will have over your life, and what control your folks will have in the remaining months? Could you also plan your exit?
I know you feel bad for your mom richie, but don't put up with her crap. You didn't make her miserable, the stupid cult did. Guilt and fear is what cults use to keep people from leaving. I am sure your mom learned her lessons well.
Take care bro
CYP