I'm not sure how else to explain what I just stated. I'm fairly certain I will be unable to restate it in such a way so as to make it more palatable for you to accept. I understand your frustration with putting forth so much effort toward something, only to have it ultimately rejected. I totally get that.
However, multiple factions per NPC ID have been nothing short of problematic. Shared game assets, conflicting views on NPC lore and outright attempts at civil war, has given the Staff reason to be cautious when deciding to add a second or third official faction to an NPC ID.
The admins have to decide whether the added factions are sufficiently different than their official faction counterparts, and if so, is it worth all the drama that will inevitably come about with their inclusion as an official faction. In your case, the two other Official factions have already been beset with Oorp conflicts between themselves. Adding a third would be tantamount to pouring gasoline on the server and handing you the match.
As unpleasant as this is for you to hear, the Admins feel it is in your best interests to remain unofficial. It is in the best interests of the overall community. Lastly, it is in the best interests of the Staff.