Agree, once I had booked two seats in Pnbe Raj from New Delhi to Patna and later I had to take my sister alongwith me, I went to PRS, I told him to book the seat in same coach, he took my previous ticket and later when he booked the ticket for my sister, it was in same coach and that too in same cabin. My seats were 34 and 35 and the seat alloted for my sister was 36..