Filtering a QBO Class picks up everything in the subClasses + the Class. I.e. the sum of the subClasses is off by the amounts in the Class. It does not look like what is in the Class (but not the subClass) can be isolated and reported. Never mind that the check boxes show only the Class, and not the subClasses checked. 

I spent three hours on the phone with front line telephone support, who was chatting with the operations team at the same time.  The problem was duplicated on their end.  A trouble ticket was filed.  The tech warned me about how long this would take.