He must have been giving the same reason what I was giving! i.e. "the deviation from actual route (MMR-MAS) to the present route (MMR-SC-MAS) must not be more than 15%"
I tried SC to SBC via TPTY (1 day halt at TPTY for darshan), trains were Narayandri and HTE-YPR SF from TPTY), he denied , so I was with left with no other option and booking different tickets for both section!