I am a senior citizen.I want to go from delhi to Blore by rajdhani on 15April by lower berths by 2AC both for me and wife.When I pressed the condition atleast 2 lower berths,the irctc site says it will book only with no choice,though 78 2tier berths are available.The money also was deducted from bank.Can someone pl.suggest how to book 2 lower.