I would have thought it is more likely it is the ticket machine rather than the bus. If it was one in the row in B garage at Derby, few ever seem to move. But, never say never. If 82 shows then that definitely isn't the coach
But you could save the mpg and just have more passengers on less buses. Elsewhere, someone suggested more drivers were leaving. I think frustration levels are very high. It is a shame, they have some lovely drivers.
Notts and Derby 74 (FJ10 OXP) is now working Red Arrow services helping out Trentbarton, so it is possible that it is that coach that is tracking as coach 80. I've seen a picture of it, but not physically seen it myself.