User blog comment:Jopjopjop/High School DxD BorN episode 3 review/@comment-3290441-20150419120208/@comment-26209278-20150419140139

They're mixing the 1st half of the events of Vol.7 into the events of Volumes 5+6. Most likely the main order of events will stay the same, ie, the RG first, than the Diodora fight/JD, and finally the Loki battle. Just the build up of Volume 7, aka the Akeno backstory, is being woven into the events of 5/6 now, instead of doing it 5, then 6, then 7, so we can get a backstory on the characters at the same time instead of one than the other.