I think I see now.  Thank you!!

That is really confusing nomenclature, in particular this paragraph in the rules "When you choose a creature to act with, it is called activating that creature. Taking its action is known as a creature activation."  That's just many uses of "Active, Activate, Activating..."

Our added confusion is what happens during the Reset Creatures phase, i.e. turning your creatures to the "active" state.  We all thought *that* was when stagger was supposed to be removed.