One of the reasons why there a change in the 2nd Division for the next year, is that the real format is to make it one league with 14 teams, with all the B teams now going into a new league. But this first year is made up of groups with all the top teams going into a playoff group to play for those two promotion teams. So, when you look at the teams for next year, it will read as 12 teams.
I have made the changes you had suggested for the 2nd and 3rd division, but still running into the same problem with the promotion annoyingly.
This is a file that a mix of real (Hero I-Leagues setup and as much as the Indian State leagues possible) and a Super league which is fantasy. The 3rd division is supposed to come into existence in 2024, and the way it should be formed is invited teams from State FA and accepted if they meant the Indian FA criteria, what the 2nd division used to be. This is why I thought having the best teams from the lower division would be best to add into the league.