Helpdesk In-depth should reflect the customozible ticket statuses
First,my apologies for not being able to get back to you earlier on this thread. The unresolved tickets reflect that are in any status except for resolved and closed status. Both these default statuses are considered to be the same when it comes to closure of a ticket.
You would still be able to view how many tickets that are available in this status by drilling down to the next level in the report page.