Maduin, one of the previous Sages decided to pass the titles on to if i'm recalling correctly: Hakurei Ryuu, AmagalmationSage...and I think Kay.
Pretty sure it hasn't changed since last I checked.
Maduin was known for being a "jester" hell the title of his blog was "A Really Bad Joke" and I like to consider this his biggest proof of that title. He was a genius.
Anyway you won't see much of a mention of it because Core Theory was turned on by everyone (even though in my personal opinion, Core Theory itself was a sound idea, it was just quickly spread thin and crumbled under the eagerness of others)
If i'm recalling correctly, these three sages actually used the titles correctly. It doesn't give them any role they haven't already been doing. It's just a confirmation of that fact, a way to make it stand out.
Other than the occasional mention of those three holding the titles, you'll very rarely see anything of Core Theory spoke about now.
...that's probably for the best.