Inconsistent view of user role on a site

Steps to reproduce:
1. Navigate into a site of which you are a member
2. Select the Site Members menu option
3. View my own site permissions in the list.
Result: Permissions shown as Collaborator (see attachment)
4. Navigate to the Site Dashboard
5. View the list of site managers shown in the Site Profile dashlet
Result: I am included in the Site Managers list (see attachement)
6. Attempt to upgrade someone to site manager
Result: Upgrade successful despite this being apparently above my own role

Impact:
It's not clear from the two separate views on the site which level my role is, although it seems to be that I am a site manager if I have permissions to create other site managers.

Note - Raising as a Category 2: Working feature but unintuitive user interface.