User blog comment:Xhatefate/DxD Updates~/@comment-85.226.152.87-20150325020030/@comment-16281343-20150325103319

That's because the extra scenes are included in it.

IIRC, there are in total 30 minutes worth of extra scenes. 5 minutes per Volume. Each Volume has 2 episodes.

So, each episode in kissanime will be 2-3 minutes longer than the one you have w/c is most likely the tv aired episodes.