User blog comment:Neowitch/665 - In case of risks or undesired side effects.../@comment-3119203-20120429134452

And down go the Magellan admiral theories.....and dammit Zoro, you have wasted two years with the strongest swordsman in the world and get taken down by a freakin yeti. Wow. You are disappointed me almost as much as Luffy right now.

About Magellan, he was probably inactive for a while after getting the living shit beat out of him. To fill the spot, Hannyabal was promoted, and then when Magellan returned, they left Hannyabal there for unknown reasons.