User blog comment:Omega natsu2/Episode 181: Fairy Tail vs. Executioners, Review./@comment-25519336-20140511003824/@comment-7418318-20140511094057

In the Tenrou arc Makarov said that the S-Class Mages would stand in the way of the candidates. Since this comment included Mirajane (who later fought against Elfman and Evergreen), we can assume that her title was reinstated at some point, thus the former is no longer true.