For 2 months our lowest seniority relief feeder driver has been covering 2100 Sunday's. Five of those Sunday's he's subsequently worked Monday giving him double time for the Sunday work. I'm the highest seniority driver who works nights and have only been asked to cover one Sunday. Feeder tells me he's not scheduled Monday so I have no claim. They've used him to cover jobs not only in our center but other centers as well on those Monday's. my believe is 2100 Sunday should be put up for bid weekly and considered extra work. Any advice? FYI, we don't have a Sunday sort, the job retrieves preload boxes then shifts the preload. Thanks