Yes friend. I agree with you as Panvel comes under CR so there is a possibility that CR TTE check the ticket who has the boarding point from Panvel and completes his duty.
I am also surprised to see that this train (inspite of being duronto) taking two hours to reach BSR from PNVL while other mail/exp trains are taking 60 to 75 minutes which is why I am concerned bcoz in 2 hours TTE can easily check 6 to 7 coaches.