Western Railway :- Dil Bole Baar Baar WR. WR - Abdul Rehman

hi guys. yesterday i was trying to book tickets in train no. 12166 from bsb to ltt in class 3ac. the coach layout in availability section shows only 1 coach of 3ac { b1} but in availabilty column the maximum no of berths available is 100. i am not able to understand how it is possible. as maximum no of berths available in 3ac is 64 only. please explain
thanks

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