Indian Railway Catering & Tourism Corporation [IRCTC] — Seat allocation to RAC tickets should be based on age

My parents are travelling from KPD to HWH station. They booked ticket 2 months before and got RAC, now after chart preparation they got middle berth and upper berth seat. My father is 57years old and mu=other is 54years old. They got upper and middle while going from GKP to KPD. Then a person got up-gradation from sleeper class to 3A and got lower berth. Aren't this is expected to help the passenger already in the coach should get the preference. My father is a cardiac. I guess he need more attention from any upgrade from sleeper. I expect atleast a check on this as their train will be moving in mid night today please ateast get them a better comfortable seat this time in journey in Indian railways.