First of let me say that you are not the first nor the last one who feels this. I don't know you're age nor I want to but it is very normal to feel this way between the ages of 15-20.
You feel as if you're parents don't want nothing good for you or you know better about life than you're parents. I felt this way when I was younger. It's normal.
Two points here I would like to make:
(1) Can you listen to yourself? Taking things such as '75 pounds' to account.
Whatever the amount is in the end they are your parents and these things, though minor, would amount to something that will destroy relationships with you're family rather than bridging them.
(2) What I have understood in you're post (and correct me if I'm wrong here) you were in a foster house before going back to you're biological parents right? If so then that explains a lot! How? You're parents are delighted for you're comeback and to show you there love (and that's the way it goes with parents I suppose) they become more protective than they usually are.
Again same as above, he is far to protective of you than he usually is due to the time you were not there in his life.
We as the children tend to overreact on things our parents do. Heck I still do that from time to time :-[ But nevertheless you have to understand in Islam they have a right onto you as you have yours onto them so long as you live in the same roof. When you live with your husband then the rights shift from the parents to the husband.
Also Islam emphasizes on family more than anything in this earth.
As brother Alpha Dude said is actually correct. He's wise!
This said I have to say that I am no psychologist so take my words with a pinch of salt if you want to. And Allah knows best.