[Kanji_The_Wanderer]

Okay, maybe this will clear it up. (I hope) *prays*

The manga was made first. (obviously)

The anime follows the manga, the manga was created by Tsugumi Oba, who made up the DN story, and everyone in it. So the anime, is more accurate to the true storyline, and I mean storyline, by the conclusion of events.

The movie creators (Warner Bros) took everything from the manga, including the ending, and mixed it all around. Taking events from book 11 and putting them in book 6. They totally scrambled the order of events, and made a movie out of it. The movie with the battle between just L and Light, is made up by Warner Bros.

So the manga came first, the anime is just like the manga. The movies take their own course in showing the events, a totally different scenario.

I pray this answers your questions, if not I will have to resign as L for being so dense!