User blog comment:IamJakuhoRaikoben/Chapter 455: Magnolia's Defensive Battle, Review./@comment-26287497-20151005123021/@comment-24546844-20151005132011

I don't think it was stated anywhere that she permanently gained it. If I'm not wrong she only took over a fraction of Seilah's power and only gave a single order, and it was to someone who'd already been affected by Macro beffore. Correct me if I'm wrong.