So recently my building has started a day shift running directly after the preload. They had a sign up sheet where everyone who signed up was given a position the following week, I was assigned to load. Once the double shifting started yesterday there was a new paper that stated everyone who was on the shift as well as their belts etc. I was not on this list. When I talked to the lady who ran it she basically told me that they were currently only accepting sorters and people who had more than 3 years because they hired a lot of new people to work the day sort and they are all loaders. When I asked to see a seniority list of some kind I was told no because " would hit the fan" can I file on this or do new hires have some type of right to work over me during the holidays? I talked to a steward but he wasn't sure.