if in PR few passings are mentioned then it gets added along with full TT (no extra TLs needed)
for route correction, any number of passing in any number of TLs can be done.
but member claims he saw in caution order (which he won't be able to share due to security concerns), time as 8.20 (instead of 8.18) - just for increasing...
more... 2 mins of passing time, in extra new TLs where it has got no relevancy (like route correction) , such updates may not be promoted.
Like this attached pic of wtt, now one may go n add passing in numerous trains, but it won't be relevant naa rather it would add a glitch -- a minor glitch in adding charting time as well as in selecting To/From stations in that train page