Jagged Line and overlap on drawing ellipses

my pencil/brush tool doesn’t register on my Cintiq until i’m a 1/4 into drawing my ellipse. also the Pencil/brush does a weird overlap when i swing my stylus to complete the curve. in the attachement they yellow arrow shows the straightline my tool makes when i’m drawing ellipse. and the red line shows the overlap. How can i fix this to make it smoother. also my Pencil/brush tool is at size 10, smooth 20. this also happens on bit map.

Hi eeyamamoto.

Have you checked to make sure all drivers for your Cintiq are up to date? Do you have problems with the Cintiq in any other drawing programs, or just Storyboard?