I'm not sure I understand your answer.
To clarify - here's my setup:
- "Mobile Users A" tab Group
 
- "Mobile Users B" tab Group
 
- The standard "Mobile Users" tab group still exists. Do I need to delete this? Uncheck "Show" for all the screens in it?
 
Each group (A or B) has 3 common screens (Invoices, Customers, Actrivities), while the B group has an additional screen (Leads). Different users see different tab groups. However, the manager/admin sees ALL screens - even duplicates of the Leads screen.
Is there a better way to set this up? Perhaps using roles? 
Or is there no solution, and when managers sign in they will always see duplicates of the 3 screens.