Exploding Curves

Hello all. I'm having a hard time in the later stages of a definition intended to help laser cut a series of shapes. The definition (all of which is attached below) takes a lofted form I created, isotrims it and then takes each rectangular panel and splits them in half to form triangles with apertures. The issue I am having is in my attempt to get the final curves ready for laser cutting.

As you can see, I have isolated the interior curves, but grasshopper is outputting all my other curves as two triangles, NOT as a rhombus/rectangle with a diagonal line. I need these two items separated so I can prepare for laser cutting properly.

Attached is also a series of screenshots showing how 2 of the 3 sides of the triangles stay connected even after I explode them. No matter what I do (explode or list item into points to draw the lines from there), I can't get these curves separated.

Please help me through getting these curves separated as I need them. Thanks!