@Tyler I know this problem very well!
Happened twice to me
Okay so basically being a guild founder for a long time I’ve seen a few bugs here and then. What I believe you are referring to is the unable to leave/kick bug.
FOR ME <----- This Happens when I have tried to kick a member during a slow internet connection that leads to me being disconnected before the action is processed. Therefore nobody in my guild can kick/promote the player, nor can he leave without Deca’s help.
Steve and Dhayne have told me it may happen because the server doesn’t recognize a name change (wrong for both of my cases) or Deca may have personally edited their accounts in some way or form. (maybe they did, I would not know)
Personally I believe it’s a glitch involving connection and server task process, and maybe the game thinking it has already done that action. that’s how it has happened to me anyways I’m the past.
If you send deca a ticket, they will kick you from the guild so have no fear