User blog comment:DaNASCAT/Technical Update: April 20, 2016/@comment-25523075-20160421191910

This bug is already on wikia for months I think: http://wiisports.wikia.com/wiki/Thread:10301

If someone edits a message or reply on a Message Wall, it will say always that you edited it. But normally the user who replied edited it.

Look at this: http://goo.gl/y93TqH

It says GVNintendo edited the message. But normally Qubit2222 did.