Do you mean that the Staff Tab you created shows on the nav bar (or members tab), and it doesn't show any members when you select it? Or does the tab not show at all? If it is the latter, have you checked that the permission to view Staff Tabs is set to allow? And if so, the only other two things I can think of is that the tab is not set to active, or is set to not be public.It doesn't seem to show any users, I've selected the groups I'd like to show but no one appears.
I don't have it installed at the moment on my dev site but I am sure the tabs and groups are sorted by display order. I'll need to check into this. After I finish with my Roster add-on I'll add the option to list multiple groups on one page (it was how the original staff add-on worked).I'd also love it if it were able to have different ordering variables, e.g the groups Display Priority, and also as someone mentioned above, an option to have multiple groups display on one page.