RealCADD and iPocket Draw

But i think that overriding lines are a mistake.

Sorry, I don't understand exactly what you mean.

If you watch my first video you could see that override lines are traced when i click one point after another.

I think it is because the points of your Bézier curve are too close and the minimum length that I choose for the control points is too big.
Perhaps, I have to reduce this minimum length.

Maybe.