User blog comment:FairyRaven/Fairy Tail Chapter 368: The Third Seal, Review and Commentary/@comment-3075024-20140131033133/@comment-7418318-20140131095642

Fairy Tail only learned that Tartarus was targeting the former councilors because they happened to be on scene during an attack by chance.

And the way Fairy Tail behaves, they probably set out for the other four councilors and only then informed other guilds (if they even did so in the first place), so it's only natural that the other guilds are legging behind.

They might already be on the move, but we just weren't told about it and it'll be cleared up once one of them arrives at the last moment to save an otherwise doomed Fairy Tail team.