Hi, Lokey
Looked at your Lset file, I think you need to organize it a little bit more, Think of your dxf as a temp-let to create your part. Hears a .lset file that hopefully will give you a guide to doing what I think you want hear.
Setting the layer depth should be accurate, Click on the LH layer and set the values in the layer tab below.
When you create pockets or offset's don't forget to delete the chaine you used to create them with.
It looks like your starting to get the steps down, Just a steep learning curve.
Chip