Perhaps because it is intended to be difficult? The point, after all, is to advance the kingdom of God, not the hierarchy of leaders. Christ is the leader, the ruler, the potentate, the king. The rest are simply to advance his will. After all, isn't he the one who said that the first would be last? Didn't he also say that the one who would be a leader must be the servant?
That kinda turns all the human hierarchies on their heads.