There's a question I've been wondering about for quite some time now, concerning the post time jump manga.

Why the hell do all of the rookie eight (excluding naruto who never got promoted) who graduated to the chuunin class still seem to operate under the authority of there old jounin instructors? I mean I thought they'd be sent off individiualy or with other chuunin on missions as opposed to sticking with their old teachers.

I even thought that the jounin teachers would move on to a new squad of genin candidates after there former students ranked up. Can anyone explain why we don't have a new generation of genin running around with Kakashi, Asuma, and Kurnei?