Went at 7:30am on 20th june'15 to book the tickets from Yesvantpur to Howrah on this 12246/Yesvantpur-Howrah Duronto Express for 18th Oct'15 journey (starting day of adv booking). In front of myself there were around 16 people, the door of the counter opened at 7:40am and the counter finally opened at 8am exactly. When my turn came at 8:05am I was surprised to see that 2nd AC, 3rd AC and Sleeper class already went to REGRET (no bookings allowed) and 1st AC went to WL 24. So, how this was possible that within 5 mins bookings went to REGRET.