[quote=@Meta]
<Snipped quote by DarkwolfX37>

I think it was because the anime couldn't fit everything contained in the LN, so it became more of a "here are the important parts." I don't know about the movie, but I think it's using the author's novels as source material and altering it as necessary to fit the film.
[/quote]

That's exactly what happened, but it's not like the source material is better. The parts that it shows are faithful to the LNs, it just doesn't show everything because the contract was for a standard 13 episode season, rather than an open ended one like the big ones. 
Damn. So much for that then. Then again, even the game that totally changes everything sucks, but I don't know if the original author was involved in that game or not so I can't blame him for anything more than the source material.