Loft seam adjustment

I am working on taking a brep (let's say the result of a 3d voronio), offseting the brep based on the real world sheet thickness, and then lofting the edges of the matching faces together to get my mitres. These parts can be cnc'd with the mitres facing up and then the given brep can be physically reconstructed. We have done this on projects before using solidworks but it's tedious. I tried to start working this out using grasshopper and I am getting stuck on the loft seams all adjusting as expected. Let me say that if I baked the brep into rhino and used the curve from face border command all of these mitres loft as expected and the seams are automatically aligned. In GH I get mixed reults. I am using loft options and toggling between true and false on the seam adjustment and it fails to produce the perfect set of mitres. I do get a usable set of the required mitres when I bake the lofts with both the true and false setting but I then have to fish through the model and delte the bad surfaces.

First question - WHY DOES IT WORK DIRECTLY IN RHINO

Secondly - WHAT IS A GOOD SOLUTION FOR SEAM ALIGNMENT