Two signal path questions

[groovilator]

1.
I feel like I should have determined this long ago, but what is the signal path on the insert section of a track? Does it go top to bottom or bottom to top?

2.
Does PT ever limit the number of bus paths?
I recently discovered the feature of renaming a bus path, which, in most of the sessions I've been working on recently, also creates an entirely new path while leaving the original path free, i.e., if I rename "11-12" to "Gtr Verb," then I get a new bus path without losing "11-12."
But in one session, that's not the case; I seem to have run out of paths. A few of the bus paths still have their default numbers and the rest have custom names. The total number of bus paths I have access to there is 22, or 11 stereo pairs.

I'm using the 2018.4 version.

[amagras]

1. Top to bottom. Limited to 10.
2. Afaik no, as soon as you default the i/o the list will repopulate the busses no renamed starting on 1-2 again.

[groovilator]

Thank you!