I never saw the first pic you posted or the software program it came from.
That said, there will be 21 layers in the dxf and probably 21 layers in LC and each layer would be made up
of chains. I don't know how you control layers in your software. The manual talks about use of layers and the logic behind them
if you so deisre to follow what is suggested.
I notice it can generate the GCODE, so why even use LC?
Did you dry run the file in Mach, what was it cutting? Looks like it will cut what you actualy want to keep if it were a cladded board.
LC is an importer of a file and not a CAD program, thus you are telling LC what you want to do with the different layers. You are defining
how you want to machine something.
Does Orcad or whatever program have a post processor for Mach3?
RICH