User blog comment:IamJakuhoRaikoben/Sorcerer Magazine, Issue 27: March 2014/@comment-4449950-20140405030356/@comment-24776238-20140405030820

If I am understanding the Google translated tweet right, then even Mashima is saying it'll take some time for the animation to even out...but yeah, that was pretty noticeably screwed up :\ I think it was some sort of odd modern AU thing too.