LookML Diagram

[ahmed_ghazaly_1]

The base view is not the one highlighted in dark blue in the LookML Diagram for one of my explores. Not sure why. 

The explore the diagram is generated for has the customers view as the base view while the orders view should be the base view since the explore is for orders and it has the orders view as its base view.

The only thing I can think of that might be causing this is because they are coming from two different schemas. Could this be the reason? how can I get the diagram to show the correct base view?

Thanks