We have heard from some other version 6 customers that their license count seemed to be out of sync with the actual number of computers.

Solution A:  Ensure that there are no other Channels on the same server. If there are, it's possible that the computers in the additional Channel(s) are also using licenses.

Solution B:  Reset the license packs by doing the following:

1. Open the Console and select File | Channel Properties | Settings <tab>. Uncheck the option to "automatically license computers as necessary".

2. Within the Console, select all computers within the Assignments pane (using Ctrl or Shift key). Right-click and select Properties. Uncheck the "Licensed computer" option. (This step will also display the total number of computers in the Channel.)

3. Right-click on the Prism Deploy Channel Manager program found in your system tray and stop and restart the server. 

4. View the Licenses in use -- it should now be "0".

5. Repeat step 1. to turn on the option to "automatically license computers as necessary". If you prefer, you can also manually re-license all computers by repeating step 2. Verify the total licenses in use now match the number of computers in the Channel.