Tamil Nadu State Transport Corporation [TNSTC] — Stopping in multiple stops

I was travelling from salem to Bangalore from one to one bus (tn 30 N 1999) the bus was supposed to go to Bangalore without stopping and collecting passengers but it stopped in Bangalore and was collecting passengers and one to one bus don’t have conductors how can they do this .Then what is the purpose of putting one to one . I boarded on bus on 6th of October early morning 4.40.