[IAC#RG] Mafia Tatkal Reservation

Today while I have gone to book the ticket in the railway reservation counter , I have seen that more than 15 - 20 tatkal tickets were already booked by the counter before 10am. The tatkal ticket booking was already started since 9:45 am.
Is this the tatkal reservation or Mafia Tatkal.
What actually was happening could any one who has knowledge of this system please simplify it.....
How all the tatkal tickets is finished till 10:01 am....

Ankit Khetan
India