[V8i/SS10] Place quarter ellipse tangent to something?

I could swear I used to do this, but I could also be mistaken. Is it possible to place a half or quarter ellipse tangent to two lines?
Geopak V8i Superelevated cross sections are not smooth, any idea why?

As you can see below, in the areas where my cross sections are superelevated, this is what they look like. Specifically this is how they look in-between each of the stations I defined in the excel import...