By the sound of your questions she's had no ring training whatsoever and it's possible you're expecting too much too soon.

She sounds like she's overwhelmed and confused! If that's the case, you'd need to begin her ring training just like you would with a puppy. One element at a time!

If you're planning on showing her any time soon and since you're already having problems with her sitting when she shouldn't, I'd suggest putting obedience training on the back burner until she has the show ring down pat.

Many dogs can do confirmation and obedience at the same time. But it takes a considerable amount of time and effort for them to learn the difference.

The first thing I'd suggest working on is control on lead. Until she has that down, everything else is just going to confuse her even more. An already out of control dog will just become more confused when new commands are introduced.

From what you've said, you know how to train her. You're simply getting ahead of yourself and need to go back to square one.