User blog comment:Miskos3/Fairy Tail 539: World Destruction, Review/@comment-26184007-20170610204900/@comment-7418318-20170611053708

Wait... back up a moment...

First you say that Acnologia has to be near a city when he destroys it and right the next line is that the Flare is a spell with a planetary range?

If it is a "planetary level attack" then range isn't an issue since it could hit all over the planet and thus make your previous argument about Acnologia having to be near the city to destroy it mute.

This really feels a little like talking to CNBA. oO

Regarding the qustion itself, I too am in with Misk on this. There are loads and loads of similarly structured scenes not just in Fairy Tail, but in pertty much every manga or any story. Flipping back and forth between two places where things happen at the same time can be confusing, so the author/mangaka/storywriter/whatever first shows one place, then makes a shot jump back in time to show the other place. That is very clearly what happened here too.