I had a question about working different shifts when needed/asked. I am a preloader, today everyone was asked if they wanted to come in for the local sort/car wash shift. I told the first sup no and the 2nd sup no, the 2nd sup came back and said I had to b/c I am the lowest on the seniority list. (not even sure if that is true b/c there was a guy that worked tues 12/30 that was hired way after me) I said whatever, ill work (its all overtime anyways). But in another instance do I HAVE to work? It just dosent seem right.