I accepted a job offer with a company I am really excited to work for, I won't start the position for another month. I was in a senior level management position and decided to step down to a less stressful position.
In this interim I have been contacted weekly with additional responsibilities and duties that are being added on to my new role. Originally after accepting the offer I asked for a clear outline of duties and expectations, and all the things they have added on are the exact things I had asked about initially. Originally they said those responsibilities did not apply to the position I was accepting.
I explained to them the new additional responsibilities change the position and make it a senior level position (which was exactly what I did for my previous employer). They claimed they were unaware of the different titles and job responsibilities associated with each title. I love the company and am fully capable of doing the job with the added responsibilities but am wanting to renegotiate our original contract.
This position has changed from mid level management to senior management which has a substantial pay difference. I negotiated the original salary based on the original position. Would this be unprofessional on my part to attempt renegotiating at this point?