It will all depend on how an organization works in game, you have to assume the organization will be able to own assets in various forms. Will someone who has TEST as secondary org be able to access all the same assets if they are handed power ever meant or by dirty dealings?
Perhaps that is the simple fix here, no one who has an org as secondary are able to hold any positions of power within the main Orgs structure, in turn ownership of the assets for the main org will only be accessible by someone who has 1. TEST as main org 2. Given the role.
It would mean for someone setting their Org main to us when it was originally a secondary then there must be some sort of vetting for that org to say 'yes or no' to that player setting us as their main Org.
I personally think the bigger Org's will do away with secondary/casual linked Orgs due to security and risk unless there is clad-iron protection put in. I am mainly thinking of the way EVE was/is with espionage, I am not saying I am against it - if anything I am for it as it adds a cool dynamic in my view. I am just against making it easier for would be Spy's.