Complex terrain ignores edits in original terrains?

Either I'm making a silly mistake, my models have an issue or it seems like to me that edits made to the source terrains using the new ability to edit the model without turning off rules doesn't seem to carry across into another model with a complex terrain. Anyone else tested this?

You can see the contours of the source and complex model below where I removed an element messing with the levels below:

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