In our office our senior manager has come up with a weekly rota for a job and my name is on it twice, everyone else has to do it once a week.When I asked why, he said it was because if it wasn't me it would be someone else doing it twice. I said I thought it should be prorata'd so that the full timers do it more than part timers as obviously they are there more (I only work 3 days, so I'm doing it 2 out of 3 days). I suggested a fortnightly rota so maybe the p/t staff do it 2 times in a fortnight and the f/t staff do it 3 times a fortnight. He probably thinks I'm making a fuss over nothing. AIBU?