In this train,BGP-PNBE is one of the Topmost booking pair of stations and 16 halts b/w both the stations mean presence of all those unauthorised passengers (Both Wait list and Without Ticket passengers). This train is meant to cater local passengers b/w BGP and PNBE and that's why Rly Board have granted 16 halts b/w both the stations.
Better run a Intercity type train between BGP-PNBE just ahead or behind this train. And remove those halts which provide more passengers for PNBE than ANVT. This can help to a certain extent.