Why were you Mum then with out asking the TTE,those things happen also depending on en-route joining dear...Say for example you are in RAC from JU-DEE in 12464 and UR ticket holder comes to travel from JU-JP,the TTE shall give him the full berth to him where it shall be used by another passenger from JP-DEE...The TTE cannot clear your RAC and give that berth to you to use it,he can just tell you can adjust in that till JP till new joinee comes.If he doesn't it shall be yours till DEE.