On a whim the other day, I changed my meta name from Lord Torgamus to Popular Demand. I just noticed that the old name has "stuck" to the author tag of a Community Wiki question I asked before the change; everywhere else on meta, my new name displays as expected. Is this a feature? Is it a bug? Mostly I'm just curious, as I can't think of a strong reason in favor of keeping this behavior or a strong reason for changing it.
A question somewhat like this has been raised before as Migrated questions retain old usernames on Community Wiki questions, but the previous poster implied that the issue had something to do with migration, which my situation shows is not the case.