How to display the billed vs non-billed time of a user in a time report

To display the billed vs non-billed time of a user in a time report, make sure you: 

•  Add the Billed Status field under the Display & Group By area, AND

•  Leave the Exclude Billed Time and Exclude Unbilled Time options unchecked under the Advanced Report Settings area

The non-billed vs billed time entries will show up stacked upon each other per user.