very. very interesting.
i'll comment on your friends post in here:
In your game, there is only two state for change the controling faction : election, and civil war. And, apparently, this is not the case here.
that is not correct. war, civil war and election are all conflict states, and can change assets, station and system control.
Support: There is actually a third state that may help to clear up some of the confusion here.
The third state is a brief moment called a 'Coup' (coups d'état) whereby an overwhelming difference of influence such as in the Jotun system may cause there to be no need for a civil war as the controlling minor faction can simply be out-done by the currently winning minor faction. This can only happen in certain circumstances where the factions were unable to get into a civil war with each other previously and is quite rare.
It does however, judging by the difference in influence, look incredibly likely that this is the case here and the Liberals of 31 Arietis indeed claimed ownership of the system outright.
this would be totally new to me. because support is known to not-be-always-knowledgeable about the BGS (shown in many bug reports about expansion, which all got different answers, for exampel on expansion range), I'm hesitating, that this is true.
what the understanding of the term "coup d'etat" has been in this thread till now: a minor faction, that gets to 60%+ influence in a system, will always challenge the system controlling faction for a war/civil on system control.
this has been seen often. very often this war is won as soon as it gets active, and you can go to the CZ or not...
a scenario like support describes is unknown to me.
so, my understanding of the events in your friends post is:
1. Liberals of Arietis is a faction, that expanded into Jotun. Therefore they will get wars, not civil wars, if getting into conflict with local minor faction (or they get an election).
2. First war (25 march - 7 april), if it has been with the system controlling faction, wasn't won.
3. after some time, Liberals of Arietis challenged the Dukes of Jotun a second time - war got pending.
4. Liberals of Arietis won that second war and station/system control. But due to a known bug, which shows conflict zones and war active one day longer (and you can still hand in bonds), while the war is already won, it looked to you, like the war still went on. a tick later, CZ should be gone.
... little bit sorry for the dukes of jotun, but hey - i hope the liberals accept my old permit!