In a multiuser environment the Administrator can see all Report Types created by other user. A user can only see the templates and reports created as well as data for a specified device or Account (See Business Groups.)User Configuration Screen
A Users templates including their drilldown Templates, Reports and Alerts will not be seen by other users except the Administrator.
Note: When creating a new Administrator, overall admin templates are not shared. They are however accessible from the Template menu and can be saved as New for the other Administrators.