ok so if i understand this the other carrier was taking a day of leave and changed her mind? or never really put in for it , and then decided not to put into for it? so then the other sub, with seniority used the i was never asked to work this route in order to bump you off from working it? first what they should be doing is asking the rca if they want the route at that point the other regular carrier has to decide whether they are taking leave or not that day, if they are not that rca would be scheduled, if they are then they must put in a leave slip immediately and then you would be scheduled on the other route . if they then decide later to put in a leave slip , they would then go to the second spot on the matrix, because the other rca is unavailable . and if you know this other route its possible you could be working that one instead , i hope i made sense, what you should try to do is get them to agree to post a monthly schedule that way you will know in advance when your working