Maybe due to less TAT of Mahakoshal at NZM.
Mahakoshal or AMI SF ka RSA to phle se tha, Gondwana ka RSA probably NZM end se hoga as Mahakoshal ka TAT almost na k barabar hai shyd isiliye 22181 k rake ko 12190 bna k bhejte honge NZM se or 12189 ka rake 22182 ban k aata hoga.
Abhi filhal logical reason...
more... yhi dikhai de rha h mujhe.