Dashboard Metrics Don't Match What Is In Ticket List

Dashboard Metrics Don't Match What Is In Ticket List

The overview tab of the reports section list the current number of Open, Overdue and unassigned tickets.  However, the number of open tickets reported doesn't match the total count in the "open tickets" list.  Also the number of "overdue" tickets listed in the dashboard doesn't match the number of total tickets in the "overdue list".

I understand that the dashboard is displaying over a certain historical timeframe, but even filtering the report to just today the metrics still don't match.

How is this possible & what is the point of the dashboard if it can't be tied out to real ticket data?

Please help!