Hi Marco,
With your example let me explain what I mentioned.
I suppose you have notification number in your infoprovider.
Query A shows quality notifications totals, you can include notification number in "characteristics restriction" pane without any restriction (Never mind the warning it gives) or you can put it in "free characteristics" for Query A. Now when you run with the selections you have made, you will see the the totals of without any notification number detail. When you jump to Query B, you need to show the related orders, I suppose you have notification number in query B, you can still show the related notifications that makes the total in query A. The only thing you need to do is adding notification number in Query A and Query B, and make the assignment for notification number and other characteristics selected in Query A with RSBBS transaction. You don't need to do all stuff you mention in your last paragraph.
Yasemin...