First, regarding Rendili. Originally I did not have it on the list, and instead listed Chandrila as the Coreward provincial capital. Smarts informed me that Rendili joined the League in Cataclysm, and given its significance it seemed a natural choice for a provincial capital. As far as not marking as Alliance owned, that was merely an oversight on my part. Smarts told me that, I forgot to write it in there.
For now, I'll remove. I'm honestly not sure when it happened, I'll have to ask Smarts for clarification the next time I see him. Secondly, regarding Columex, that happened in the Force Wars, both in my second to last Isaac Cain post and the latest post by Okko, as well as the Propaganda post I made. No other worlds have been added to that list, save Rendili, and only because Smarts told me to!
Relevant Columex posts:
http://therebelfaction.com/forums/showthread.php?p=198199#post198199
http://therebelfaction.com/forums/showthread.php?p=198271#post198271
Now, as far as the Commonality's IC/OOC status, I was going to make a post easing minds last night but my pills kicked in and I was knocked out. Yes, the Commonality is still an IC faction, meaning anyone can fuck with it just as anyone could fuck with the League. In the short term, I've simply made it harder for people to justify worlds' leaving, as secession is a bit more serious than merely not renewing membership status.
In the coming weeks and months I'll be attempting takeovers of many of the worlds listed to give myself OOC legitimacy. I've been thinking about how visualizing that would work, and the best I've come up with so far is to put an asterisk next to each world after its taken, to designate it as an OOC Commonality world.
But yeah, for a while the Commonality is going to become a mixed faction, meaning if you get to a world before I do and you can justify it, there's not much I can do to stop you.