Intersect seems off

offset off.3dm (354.1 KB)
When I run Intersect, the intersection seems off. Thought I would run it by anyone willing to look. I thought it would be somewhere between the 2 surfaces, but it is on one surface edge. Maybe it is a tolerance thing. thank you ,Mark

Hi Mark - if you untrim and retrim both surfaces, you should get the intersection that you are expecting, I think.

Hello - the lower, skinnier surface has very large edge tolerance (What command).

Edge Tolerances: 0.000 to 0.482
median = 0.000 average = 0.096

RebuildEdges on that or Untrim, as Wim suggests, is probably better in this case.