I may need to code this differently because there have been a few people wanting two menus in both places. At the moment, the two menu locations were done to allow the site owner to use one or the other. The Primary is for the shorter menu that sits to the right of the logo, but if they need more room for larger menus, they use the Secondary location which is a full width menu container. It wasn’t actually coded to have two menus published at the same time.
