I have been playing around a bit and there is something strange with my administration of admins. This may explain some of the issues.
1 – Even if I logged in as WPAdmin and declared as SPAdmin I still appear as Guest on the Forum Page. Same if I log as a contributor. In any case, the SP Login button has no effect, logged in or not.
2 – I can pretty much do what I want on the Forum Administration Panel. Except:
a – create / Edit Groups and Forum
b – manage SPAdmin, expect adding authors as SPAdmins. I have added 2 WPAdmin to my site, but they do not appear in the bottom “WP Admins But Not SPF Admins” and the 2 WPAdmin existing at the SP installation are like frozen and I can edit the rights. The first one seem to be master admin (with a padlock) and the second one only has plugin, theme and use Group – I cannot edit it. There are 2 buttons per option for those 2 admins but not for regulor authors when I add them as admin. See here.
c – I have created another authors / contributor / Admin in my WP in they do not appear in the SPAdmin menu as potential Admin, etc… I see only 2 contributors that were existing before the SP upgrade – on my old version.
I hope this helps you find something. Sebastien