I think there is some confusion (I'm not an ACL expert):
As I mentioned, there is a group called "Registered"
The first image you are showing me is of the Viewing Access Level but under Groups (not viewing access) if you click the Asset Manager I think you will see it's group parent is Public no Registered so it inherits from Public. You can see the font end groups like editor and author have a parent of registered.
Hi! I'm Steve the founder and head developer of CoalaWeb design studios. I'm an avid supporter of open source projects and the GPL license.