Compare:
http://wiki.spiralknights.com/Developer
http://wiki.spiralknights.com/Credits
Not really sure what should be done about it so I figured I'd just post about it here.
Other than that, I also notice that there's no information about why/when Cory left on the Developer page.
Unfortunately, the Developer page can no longer be edited. For whatever reason, one of the Gamemasters locked the page.
That's unfortunate. I'm not too familiar with wiki editing but maybe one could make Credits redirect to Developer or we'll just have to wait for a GM to take a peek.
This may be a bit unrelated to this matter, but, I was recently in the Crimson Hammer's enemy list in the page, and had a quick thought to add the label "Boss" near Seerus' name, but as of now, there's no "Edit" button to that page. If anyone could do this for me or anyone who didn't get the chance, please ask the Game Masters about it.
Merging the two articles into one article seems appropriate. Duplicated content tends to be a pain (when one is updated and the other isn't).