Last item problem

I have a visual studio 2013 problems, and its my first post :D

First question:

When i click in the BindingNavigator "new item" the form goes to last item (its ok) but in the table item "ID" (auto increment) he auto type me "-1" and not the next number available in autoincrement.

Second question:

I need a code to auto save the modifications like access does, when i exit or just move between records the program autosave the modifications

Thanks and best regards all