there is bug.For intermediate station it is showing update platform number link enabled. This is happening while you expand list station-wise

Air-conditioned 2-tier (AC2)AC2 provides seats by day, convertible to bunks at night. AC2 coaches are not divided into separate compartments, but are open-plan, with berths arranged in bays of four (two upper, two lower) on one side of the aisle, and in bays of two along the coach side above and below the windows on the other side of the aisle. Each bay is curtained off for privacy, and an attendant distributes pillows, sheets and blankets in the evening.Right: A bay of 4 berths in an AC2 sleeper. The seat back folds down to form the bottom...

hey its showing availability... see this