probably due to lack of space
Sangha or Express will be on Pf-1 and other on PF-5-Pf-6 will be with tpty pass and PF-7 will have hampi-tough platform allocation-probably one will go to Pf-4-but then sbc-mys strech will it keep trailing 16517 all the way! or Sangha will be so punctual that this train will keep to time