There seem to be problem with access management at leas for all websites.
After disappearing of "done"-Message, settings seem to be reseted.
Please see 4 screenshots to reproduce step details
Piwik 2.1.b3, FF27
when looking in the settings for each site things seem to be set fine.
but it's not shown - only for the first switch to green...
Thanks for the feedback.
the table lets you "Apply new permission" to the users.
it does not color in green if a user already has access to all websites.
I rename ticket with scope.