I'm a cover driver, the lowest seniority. I came from pre-load, still do pre-load every day (when not driving... which is every day). Lately local sort has been having staffing problems, and they have been asking me to come in. At first I was happy to help, but it's gotten rather ridiculous now. I work another job after I get off pre-load, so if I work local I'm getting about 3 hours of sleep. My question is can they force me? I want to be someone they can count on, when really in need, but not a door mat.