User blog comment:FairyRaven/Fairy Tail Chapter 333: Man and Man, Dragon and Dragon, Man and Dragon, Review and Commentary/@comment-112.203.76.112-20130531132215

The timeline sure helped. Now we know that there are multiple futures so that's why Future Lucy and Future Rogue's statements conflict. Hopefully, Future Lucy's intervention (through the diary) would have some sort of impact in the new timeline they are trying to make or else she would be just an unnecessary plot device.