In the Endpoint Status Graph, the total number shows more clients than exist in the environment.
The count of clients expected on the Home Page for the Endpoint Status is that your total number of clients would show by adding up the first three items.
Clients Up to date
Clients Out of date
Clients showing for the Clients Disabled count will be included in any of the other three categories because a Disabled client could be either up to date, out of date or offline. These clients will also show up in one of the first 3 categories.