i booked it from njp. was second person in the counter. during my first option for 3A, i missed. when tried again for 2A i got it. i.e i didnt get from 12 berths, but i got from 3 berths, after one full minute (time printed in ticket 10:01).
may be becoz may keralites didnt prefer it, as the train may reach only 25th morning and its obvious that people prefer to be with families and visit church 24th night itself