Ticket examiner should have checked the upgraded passenger list. Its in the last section for every coach.. In this case how come TTE didnt check who is sitting on D12/30 as among the two pax, one is male and other is female. In his chart it must be showing D12/30 is allotted to male pax. In Every coach chart, its mentioned below, no. of RAC passengers and no. of upgraded passengers with their name & seat. Here TTE was at fault too