Your answer is on your own words. When you say "On the Manually tab under the Distribute tab, I have All Authenticated Users selected in the User Type box."
To distribute a QVW as desired, you don´t use the "Manually" tab, but "Loop Field in Document" tab instead.
You need a field with the network name (Domain\user) of each user and this field will be used in "Field Containing Recipient Information" property.
In the "Check User Identity On drop-down list", select the SAMAccountName option.
And finally, in the Target Type drop-down list, select the QlikView Server option.
Have you checked the distribution configuration in the old server ?
I had set up the Loop Field in Document tab as well as the Manually tab. Just like you mentioned above. So I kept that tab and removed what I had under the Mannually tab. This time when it ran, no files were created by the loop and reduce task. In the task log, it did give me a warning message that says "Warning: Dynamic Distribution returned no recipients using "SAMAccountName" using parameter "USER""
On the old server I noticed that after the files for each user are created, that if I right click the file and go to Properties and then to the Security tab, the user account and the QV admin account have permissions on the file. But on the new server, when I check the file permissions for each file, the All Users group and the QV admin account have been given permissions.
This would seem to be why users can open other user's .qvw files after the loop and reduce and section access.
So why would one task on one server (QVS 10) give different permissions to .qvw files than the same task on another server (QVS 11)?