Structural Systems Corner Management

Hi,

I am experimenting with Structural systems and I have an issue with the corner management feature.

The structure is basically 3 boxes placed on top of each other and the issue is that corner management is not allowing me to separate the top and the bottom members (it thinks that both members are part of the corner when they are not). I sketched the top surface extrude on the same plane that I specified the bottom surface be extruded to, Im not sure if that is the problem.

Kind regards

Michael Mullineux

SolidworksParts And Features