Here’s a weird one. After using contour to produce a series of curves for a cylinder, dividing those curves produces different results depending on whether the cylinder was created using a primitive or a loft.
Specifically, the last divided curve starts and ends at an offset relative to the other ones if the contour was done on a loft.
The actual issue is on a very complex surface where I don’t have section curves. I suppose I can section it myself with a series of planes and brep/plane intersections, but that seems to be reinventing contour.
…and thank you for the insight on using flip curve to normalize the contour results! I hadn’t seen that it was an issue of the first (and sometimes last) being flipped.