Eddy,
What problem are the editing line segments creating for you?
They do not seem to appear in a rendering or the print out.
You are right about the magic wand- no effect all. There are more segments on a large circle and fewer on small circles,
with 8 segments being the minimum, no practical maximum I can see. Probably GS's way of keeping the number of polygons
from getting out of control. Curious though, that so many curves are controlled by the magic wand value, but not this one.
Sorry for the miscue... However, why not use the wall tool?
Mark