knittingmama what a tricky situation.
I agree with llareggub. People new to management often find it difficult and try to overcompensate for their insecurities. This is particularly the case where they are managing people who used to be on the same level.
She is probably feeling insecure in her new role and is feeling she has to 'prove' that she has a right to be there. She is doing this by probably being overly directive as llareggub says, and also in her use of jargon. This is to reassure herself that she should be in the new position she's in and in an attempt to make herself and you feel that she is now superior to you.
If you come from different backgrounds then you have different things to offer, which can make this situation easier. Part of being a good manager I think is being comfortable and confident in the fact that your team may have greater expertise in some areas of work than you. As a manager you don't have to be brilliant at everything.
However she is probably thinking at the moment that she does have to prove that she is better at everything than you.
Don't feel you can't directly challenge her about her management style, while at the same time offering her your complete support in her new role, and in achieving your team's objective. Hopefully that might make her feel a bit more secure and less as though she has to act the way she has been.
Have an honest look at your own behaviour. Is there anything there that could be contributing to her treatment of you? There usually is. If you are giving off any kind of impression that you don't think she 'deserves' to have been promoted ahead of you, that might not be helping the situation. If you can demonstrate that there is no resentment there and you are on the same team, it might help.
In terms of clarity of your role, you need to be speaking to your manager about it, not going over her head. Be firm with her about defining what your role should be, don't be fobbed off, get a timescale agreed for actions needed to sort this. If there are discussions needed with higher up people, she should be having them on your behalf or at least participate in them.
Longer term, it might be an idea to do as gilly says, and consider moving on, explore the marketplace and see what's out there, while trying to improve things where you are.