Irctc — PNR NO[protected] and [protected]

Address:

East Singhbhum, Jharkhand

Booked three tickets with PNR NO[protected] and [protected] and yet another ticket the same day on[protected] and was booking for my father and mother and all the three times got a Upper berth and in SL class got both middle berth.how can this happen without any manipulation which has been done online.Please investigate.People in Ranchi and Dumka may be involved.