for the line cutting part this need to be set to zero.
Without a F3D file i can not see how you have done your set up.
I took the DXF file and ran it though F360.
Here is a F3D with a parameters set up how I may go about it. I assume 14 gauge mild steel as the material.
here is and torch setting I used
udot shed 4484 v1.f3d (603.1 KB)

udot shed plow 4484.nc (114.6 KB)
Cut file
Good, now when your about to run this program dial back your pierce delay in firecontrol to 74%
Let me know how this pans out.

