Overall you did OK. The main issue is not aligning the ellipses to the center line of the funnel (that is also the minor axis of the ellipse), and on one or two you drew through the ellipse more then 3x.

I'm asking for a page with just one funnel, try to keep the ellipses aligned to the center line, that line should divide the ellipse in 2 equal parts. If you can, try to vary the degree (width) - narrow at the center of the funnel and getting wider as you move out.