Result find Intersection element

I want to ask, I’m looking for the intersect between the two element. The result is 4 faces but the image has only 2 face. And actually it only has 2 sides.
Who can help me answer this question.
Thanks for reading.

Can anyone help me pls

Can’t tell what’s going on from what you have posted. Can you try turning off all the geometry previews, hen using a List.GetItemAtIndex node, and reviewing each of the 4 surfaces individually?

Thanks Jacob Small
I have found the surface overlap. I want to find a node that can erase a surface or filter two surfaces that overlap one surface. Can u help me!

I’m trying but I need the info I requested before. Post a sample Revit file in 2017 or older format and dyn as well.