Hi Steve - on your cylinder you show there, it looks like it's working, it just appears that you do not have very much space from the point back to the start of the closed edge so it's having to grow from 2.5 to 5 in a small distance on one side...

Basically your point spacing on the cylidner case looks like one of the points is pretty close to the end of the edge (where the radius will be 5) so that makes it somewhat different in proportion to the straight one.

Maybe if you are seeing something wrong there you could give a more detailed explanation of what you were expecting?

- Michael