You should disable JomSocial's Facebook integration. You can learn more about how to properly integrate the two on our
JomSocial Facebook integration
documentation page.
As for automatically being logged out, you can do the following:
* In the Global Configuration area of Joomla, increase the "Session Timeout". That's how long (in minutes)a user needs to be inactive before they are automatically logged out.
* Enable the "Automatically login Facebook Users" setting in JFBConnect. That should automatically log the user if their session times out due to inactivity.
Hope that helps,
Alex