Multiple Django Admin Sites on one Apache... When I log into one I get logged out of the other
I ran into a similar issue with a live & staging site hosted on the same Apache server (on CentOS). I added unique SESSION_COOKIE_NAME values to each site's settings (in local_settings.py, create one if you don't have one and import it in your settings.py), set the SESSION_COOKIE_DOMAIN for the live site and set SESSION_COOKIE_DOMAIN = None for staging. I also ran "python manage.py cleanup" to (hopefully) clean any conflicted information out of the database.
I have two Django projects and applications running on the same Apache installation.  Both projects and both applications have the same name, for example myproject.myapplication.  They are each in separately named directories so it looks like .../dir1/myproject/myapplication and .../dir2/myproject/myapplication.   
Everything about the actual public facing applications works fine.  When I log into either of the admin sites it seems ok, but if I switch and do any work on the opposite admin site I get logged out of the first one.  In short I can't be logged into both admin sites at once.  Any help would be appreciated.