Hi! I've seen a few of these "corrections" posted recently as well, and I think they've largely been posted by people who are active in editing the wiki and to whom it is thus an important detail ;)
To elaborate a little on what Blue said, the wiki is and always has been a player-driven effort first and foremost, and as such, when we were approached by our active wiki editors with a request to start and host a new wiki on our own domain, we were happy to oblige. Currently, we're still in the process of improving the new wiki and placing a redirect on the old one, and I believe it's this sense of "in progress" that also drives our wiki editors to redirect individual people. It's naturally not wrong to consult the old wiki on Gamepedia, and I am sure no one really means that by their redirects either! I've yet to post about the new wiki here in a more official capacity, because the official redirect is not yet up on the old wiki and there's generally still some work to be ...
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