From what we have learned in the many experiments all over the galaxy:
Civil Wars aren't won in conflict zones.
We had quite a few people in quite a few civil wars, and all reported that the combat bonds cashed in didn't seem to make much of a difference.
It's probably mainly missions and trading, from my experience and perceptions, that win civil wars through influence differentials.
You might want to check the Dev Forum checker
http://eft.recoil.org/
to get regular updates from the Devs.
The main sources for information about the background simulation are in the Mikunn and Lugh threads. Michael Brookes is explaining quite a lot lately.
https://forums.frontier.co.uk/showthread.php?t=97577
https://forums.frontier.co.uk/showthread.php?t=71327
Nevertheless, the situation you encounter in Ngadjal sounds a lot like a bug.
I think the best way to achieve something is to contact Michael Brookes via PM, make a description of the encountered issue, point to the tickets created, and back it up with some hard data about
- missions done for the faction over a defined amount of time
(EDIT: For a frame of reference, we have done about 800 recorded missions in our target system since 1.04, resulting in about 20% influence rise, including trading and fighting effects)
- other activity you have done to raise the influence.
It isn't guaranteed to work but it might help.
If not you will at least get a polite answer.