So today as I was leaving the morning sort I saw this kid who is also a PT morning worker but only has one year seniority and never works mornings anyway. They have him listed as "On call" although people with less seniority than him work daily. Anyway they had him drive today since he has signed the SVD cover list as i am on there as well. Except i have 2 or 3 years seniority on him. I confronted the driver sup and he played dumb. Is this something i can file a grievance over?