Agree with you, on 29th December, 2013; our 12510 GHY - SBC Express was rescheduled to depart GHY at 11.30 am whose correct time was 6.30 am. This is a regular issue with Lohit, Amarnath, GHY - BME/BKN, Dwarka Express etc.
Kamakhya Coaching Depot is better compared to GHY Coaching Depot.