Problem

If a post is edited by a moderator and moved to a different category the post is shown to be edited by the poster instead of by the moderator.

Example

User Chris posts a thread, Moderator Mark edits the post and clicks 'ok - submit' and it shows "edited by Moderator Mark" which is fine but if Moderator Mark edits the post and moves the post to a different category the post shows as "edited by User Chris" which is wrong.

Can you advise on what code needs changing?

Thanks