Thread:Shadowunleashed13/@comment-31957230-20150119141148/@comment-5215338-20150119142233

Weird... my guess is that it's a problem with his IP address. When you block a user, the option to block the IP address as well is turned on, so his ISP (internet service provider) may have assigned him the IP address of a use that was or is currently blocked on the wiki.

If this is the real problem, he can probably circumvent it by using a different device.