I and several employees have been working above our title. In the contract, it states each title and what the min/max hourly rate of pay is. The union is speaking in our behalf to have us move up to top title or only do functions within our title. I asked if we can get paid retroactively for the time we were doing a higher title's work but my shop-steward said it most likely won't happen. Is that possible? Not including the other employees, I alone would be entitled to over $20,000 for work I did even when I shouldn't have.