So the same money for different/better responsibilities? That sounds good, but I agree that you should ask for more money....
Yes. First semester I would just be the costume shop manager. Second semester they would hire someone else to take on the costume shop manager responsibilities for eight weeks while I do this. So they are coming up with more money, it will just be paid to this mysterious new person. The idea being that if this new person works out, maybe they could take on more, and I could ease in to just mentoring designers and stage managers, which is a really big problem in our system, because I am the only person who designed or stage managed or was trained in those things. The professors are a director and a tech theatre person, and then we have a tech director who has never and has no desire to design or stage manage, and a props person who is actually trained in arts administration.
ETA I think it is exciting, because I never meant to be working in costumes (especially making them) for so long. I decided while in college that I was more of a director/designer and I just got really side-tracked because this costume stuff is a skill I have. Also we are transitioning into a "real" costume shop, which I am frankly less qualified for. I put in the time and do the work, but I have a heck of a lot more training in design, directing and stage managing than in pattern making (which is none-- I am self taught), and this better serves the needs of the theatre, too, if they get someone who is passionate about making other people's designs come to life. And the mentoring role would give me more time to maybe work on some outside projects.