This leg is in GNWL quota. WL 1,2,3,4 is already given to passengers upto Chhapra or any other station between Jasidih and Chhapra which comes under GNWL. But one seat would have been vacant between TATA and JSME in GNWL. That is why other passengers got WL 5, 6 and 7. This is my analysis of the situation. DB Sir is invited to clarify more upon this.