Platform Calculations

Hi

I used to be able to cut to the bottom of my excavation with a platform element (FFL - layerworks depth) and got the Cut Volume
Then I added the layerworks up to FFL and got the Import material Volume
I stack my calculations from left to right as I would construct it, i.e. First NGL, then Cut, Then Fill

Now the platform is an absolute element that keep on referring back to GL.
Where do I tell it to calculate from the previous element and not the GL element?
What am I missing?

I am using KC2024 V7.3.8992.25276

JR