Quote Originally Posted by BlaZing View Post
They all was do that why can't they keep it like the manga and make the anime series awsome like kenichi the worlds strongets deciple.
Because one anime episode can be as long as 4 or 5 manga chapters it catches up with the manga pretty quickly. When that happens you can do one of two things:

1. Add fillers into the anime until enough time has passed to continue using the mangas story. Like Naruto, Bleach, One Piece etc.
2. Deviate from the manga and go along a different story. This usually ends with the anime "ending" whereas the manga is going on strong.

I don't mind it either way, but I find that fillers are the best of going about it. Then again if option 2 is taken you can always, at a later stage, pull an FMA. The original FMA anime finished years ago, but they decided to redo everything by following the manga completely and call it FMA: Brotherhood. Which was fantastically done.