Thank you for posting those. I have read through quite a bit of the FAQ articles. I was more referencing a more exhaustive descriptions of the features on the server. I did find a line in one of the server /info sections that mentioned shared events like that last article you linked. But it doesn't explain the details of how they are shared and what that means. Such as how you need to do 20% damage to share the loot (thanks to admins for explaining this in chat).
I interpreted it when I originally read that they are shared, as in anyone can participate in the event but I didn't know that the loot was instanced or the rules around getting each person enough credit to share the loot.