First of all, Dumka - Patna Express should get General & 2S Coaches. There was no need to make RSA with Ganga Damodar.
Secondly, 13334 & 13333 both got short terminated/originated from Bhagalpur & rescheduled from their source station. So as a result 13330 got rescheduled. The best option was to cancel empty running 13333/34 but ECR didn't hesitated to reschedule all the three trains.