Bug in Mesh Split component

Hi David,

I've encountered these two bugs in the mesh split command:

1. Above and Below are not found correctly. When taking a box, intersecting with a XY  plane at the red line, the component evaluates both sides of the mesh as below the plane.

2. Mesh Split does not work with joined meshes, and only returns disjoint meshes that are intersecting with the plane.

2a input: (a single mesh of disjoint boxes, intersecting at the red line)

2b. Output: The boxes that were intersecting with the plane (Bug2), showing everyting below the xy plane (Bug2).

2c. Definition