Here is something I noticed.
I am working on a multistory building with over 300+ zones. I have included plenum spaces using the plenum component. When I looked at my results (in the HTML output) i noticed that the plenum spaces were included in the total area.
I looked inside the plenum component and saw that is set not to have it included yet it still does. so I am thinking there is a bug somewhere.
I double checked my model by looking at the Openstudio file in the OS app and saw that the plenum area is being included there too.