Indian Railways — ticket not get confirmed.

I am travelling in train no 14650 along with my father. I had booked two tickets in 3ac and one in sleeper class from which one ticket on my name gets confirmed another one with pnr number [protected] on my father's name didn't get confirmed but the one in sleeper class on my name also get upgraded in 3ac. When we talked to tt to allow my father on the name of my ticket of sleeper class which gets confirmed in 3ac he refuses to do this and ask my father to go to the sleeper class or to pay penalty of 1150rs. What the heck is that when they already checked my name on 3rd ac then why the hell get confirmed the ticket with same name of sleeper class to the 3rd ac instead of confirming another one. My father has to leave the coach and go to the sleeper class... I am very disappointed and really don't know the reason about that stupidity that had done by ticket collector