Bug: When you look at the number of Employees and number of Visitors in the Location tab of the Bookings for a Date Range report, you will notice that the number of employees also includes those who booked for a visitors
From the help file:
Employees = COUNT DISTINCT Employee Names for all the bookings on that floor for the filter criteri
Visitors = COUNT DISTINCT Visitor Names for all the bookings on that floor on that floor for the filter criteria
Should Employees be COUNT DISTINCT Employee Names for all the bookings on that floor for the filter criteria WHERE VISITOR IS NULL?