Yes. Permissions are just objects in the page, if you are allowed to modify the
page then you are allowed to modify it's objects.
This makes logical sense because the worst you can do by modifying the
permissions
on a page is to allow everyone to modify the page which you could have done
anyway
When a user has editing right, and when enabling the Advanced user type,
this user can change the access rights of the page. Was it meant to be like
that?
I recall that this option (in previous versions) was only available for
users who have admin rights, not for anyone.
Version 2.2.1.27354 and t