if i file a grievance on two supervisors working at the same time, such as a supervisor unloading to another supervisor sorting, can I list the total hours worked by the two supervisors on my grievance or can I only get paid for one of them. Say they worked together at the same time for an hour. Can I combine their hours to list two hours on my grievance? If not, does having a witness on my grievance then give me the ability to list two hours since there are now two hourlies included in the grievance?