Understanding NFL roster rules changes for 2020

So I think I may have been wrong about that in the OP (I have since corrected it). It looks like the player will remain in PS eligibility even while "elevated" for a game. So I think he can still be poached

From the CBA Article 33 Section 5:



https://nflpaweb.blob.core.windows.net/media/Default/NFLPA/CBA2020/NFL-NFLPA_CBA_March_5_2020.pdf

If I’m understanding correctly, there’s basically two inactive roster lists on gameday and two different set of rules for the 53 and 55 man rosters. Sounds like the 54th and 55th aren’t permanently apart of the roster like the 53 are

There’s a season eligible-active 53 of 55, then a gameday-active 46 of the 53. The extra 2 slots for the 55 is for Practice Squad only, and can’t be used for signing veteran free agents? And so the two extra slots are only game by game in the first few weeks for the individual players before the team is required to put them in the 53 after 3 games, instead of being permanently apart of the roster as the 54th and 55th players