illustrator problem

whenever i draw something on illustrator it quicky snaps to its nearest curve (hope you get what i mean). for example i draw this... [ ...after releasing the mouse it quickly turns to its nearest curve like this... ( ....what can i do so that i can toggle whether the things i've drawn should snap back to nearest curve or not?

Try to paint with the Pen tool instead of the pencil, it is accurate to the pixel.
may be longer but you get exactly what you wanted.

doesn't illustrator support like the one in Flash, when you click the pencil tool, you are opt whether it is smooth, straigthen, or ink. Does illustrator have that too?

Well, sort of.
Double-click on the pencil icon and you will be presented its options.
If you want pin point acuracy of what you draw on the pencil, just slide the two bars to the left. But you will end up with more little squares, which is what makes the size of the file go up.

A lot of thanks TuxMan, didn't know there was an option when you double click on the toolbars