Well, its not me but the mechanism works the same way & the response isnt the outcome of my brain but the way IR works!!
U simply say that DRNTO/Rajdhani etc can overtake!! Y?? Coz priority (but u say: as they been charged more), then y GR (which gets charged lesser??)!!
Its just the priority sequence which Raj/GR enjoys higher & simply, horrible late run means no slot hence no priority!!