This is always a judgement call.
Some companies will give you a title and use that to assign more responsibilities to you and extract more work.
In other companies, there is a career path and the theory is short term pain for long term gain.
Only you can tell but you should, especially as a future manager, be able to go in and discuss this with the appropriate person. If you don't ask, you don't get and if you are making a committment to the company, they should be able to respond in some way.
Get your facts together, think about what you want and where you would compromise. Above all, its business, do not take it personally.