Update: Never mind, the tags have been fixed manually by the original tagger.
Could a privileged user change these tags as shown? This is better than an alias because it's not a change in ownership, the tag was just wrong to begin with.
Proof:
Nnec credits Zoe to himself (post #290356)
Other artists credit Zoe to Nnec (https://inkbunny.net/submissionview.php?id=346606)
shadowfox89666 credits Zoe to Nnec (http://www.furaffinity.net/view/20103162/ and http://www.furaffinity.net/view/20111614/)
This case of mistaken ownership actually caused some issues (http://www.furaffinity.net/journals/shadowfox89666/#jid:7613916), shadowfox thought they owned Zoe because e621 said so (??!!?). This reflects poorly on us and should be avoided in the future.
Updated by DragonItHome