train 12258, ERS to SBC was about 670 available for July 29th. I booked on IRCTC with preference of both LB, i got one LB and one SLB (70 and 73). How is that? With so many berths available, how come I got one SLB? Does this train run on full capacity even on wednesdays? If not i can take other lower berth if its unoccupied