Groups not Showing up
The most common cause of the Groups not showing that you have made is that in the WPS PRO setup page You will see a bar called Groups! There you have to assign the Group page to it! Not the Groups page!
Groups are where you make a group and the Group is then displayed on the Group page once you select a group to see.
Groups in the page you will add to your menu, do not add the group page there.