User blog comment:IamJakuhoRaikoben/Chapter 245: The Unbranded Man, Review./@comment-3987368-20110730184547/@comment-3290324-20110730194319

Actually when he ate Flame of Rebuke he was capable of using spells that he couldn't normally use. In addition he's eating Dragon Slayer Lightning so whose to say that it wouldn't have a different effect than eating Stinky Flames.

Also that wouldn't be that much of a blunder. Tite Kubo changed the source for Yasutora Sados ability three different times and Inoue Orihimes twice but it didn't do anything to his career. Even if this is a blunder people will continue to watch and enjoy Fairy Tail and his career will still be in tact.