Device Control blocking Network Print Jobs???

--SOLVED--

This is what my DC policy looks like:

I built reusable setting configurations for each of the above policies:

For the blocking policy, I changed 'Deny' to 'DenyAudit' and configured 'RemovableMediaDevices' in the 'All Removable Storage' policy above:

I'm still blocking all removable USB storage devices with the exception of devices in my Allowed Policy.  Everything seems to work now; I'll let this bake for a day or two but it's looking promising!