I just checked online and my paycheck for this week is all screwed up! i am missing 8 hours of regular pay and 4 hours for an optional day i took. I also noticed union dues where not taken out which are due this week, and no federal tax was taken out either. this is the first time something like this happens. what steps should i take to get this fixed? notify manager and shop steward? how much time do they have to get my missing time paid?