Hi Members/Admins,
1. Can anyone please help me understand what the "Tot Seats" option in PNR is all about? I have attached a pic highlighting the same
2. I also want to know one thing, why this option is visible only for few PNRs and why not all PNRs?
Thanks in advance.

the total available seats/berths in arp(advance reservation period) of 120 days, not necessarily all exists on same day but may be scattered in 120 days

this is manually updated individually for each and every train, will be visible if updated for that specific train

It's a Range of APR in that Train