Adding a new store starts you out with a completely blank slate.  Unlike the copy feature nothing has been setup or created.  You will have to add Categories, Attribute Groups, Products, etc.… when you click Add Web Store it will open to the admin interface.  See Web Store Administrator’s Interface. When you add a new web store, you will need to configure everything as all fields will be blank.  There will not be any categories, attribute groups, products, promo codes, or volume discount schedules.  See below a blank new web store: