From the link:
 
"...when displaying the non-default view control, all other modules  normally shown on the page are not rendered.
So, if you must display other view controls of the module in the  BottomPane then your options will be to either dynamically load the  other views into a placeholder control of your default view control or  use one of several variations on having your main view include all of  the other views then display or hide them appropriately."
 
Ouch. 
 
I wonder if there is a way to override this default behaviour? Hmmmm.......time to code dive deeper.