Social Theme Notification Page is wonky

I've set up a Buddypress site at and it seems to be working okay, however I have a problem with the notification page. When I access it from the menu bar at the top, the page layout gets a bit funky, giving me two menus, and moving the right hand column to below the other content.
Also, it doesn't actually show the notifications.

Screenshot will be attached - thanks in advance for your help.