Delftship Free Layer Density and Weight Calculations – it appears that there is an error in the layer weight calculations…

Well, it has been a week or so, but I got exactly zero replies. I guess not so many people have time to go methodically through the above calculations. In this case my next iteration would be to claim that layer density calculations are not correct in Delftship. Or, I am doing something fundamentally wrong, which not that unusual… Would any one help me in sorting all this out? Thank you.