Holy crap, people are allowed to hoard all those positions simultaneously in BM?! That's... That's insane. God forbid the person gets sick, goes on vacation, dies, quits, or - well - gets in trouble... The whole realm is screwed. How the hell is that even vaguely acceptable, whether IC or OOC?
OOC it's not technically breaking the rules unless it's actively undermining gameplay for other players in someway.
But IC there should be zero tolerance for it and personally I have very little respect for any realm where one person is hoarding power and the other players in it aren't working IC to overthrow them.