If I create a global report from the all departments view and I add time entry to related modules I am able to add the time spent column to the report. 

If I create a report with a specific department selected then when I add the related modules I do not have the time spent under TimeEntry. Instead I have only these options under TimeEntry:

Additional Cost

Agent Cost Per Hour

Billing Type

Create By

Created Time

Executed Time

Modified By

Modified Time

Ticket Charge Type

Time Entry Age

Time Entry Description

Time EntryAgent

Total Cost

How can I add time spent per ticket or time entry to my report?