User blog comment:FairyRaven/Fairy Tail Chapter 327: My Part Too, Review and Commentary/@comment-213.88.211.50-20130412141202/@comment-7418318-20130412143127

I'm not yet fully sure about f-Rogue. Lucy said that the actual eclipse (the moon being in front of the sun) is interferring with the controlls of the Eclipse project ("the moon is corrupting the magic" on mangapanda or "the magic contained within is running rampant" on mangastream - take your pick).

Maybe the gate's magical energy might really have been used as a cannon, if they had tried to use it at some other time.

If Rogue never learned of that interferrence, but did hear that Lucy closed the gate, it's easy to understand how he could conclude that everything is Lucy's fault.