From Atlassian documentation, the definition of Site-Admin is this:
Site-admins are the users who manage a site. The following permissions are currently available to site-admins:
- All permissions assigned to the 'administrators' group for the product(s) you have
As an administrator (user is only a member of this group), the page-watch icon of any page has a "manage watchers" function.
As a site-admin (user is only a member of this group) the "manage watchers" function is not available on any page.
Is this a bug?
If this is a bug, is there any way to check for other functions that are mis-assigned?