I'm facing a few problems when using Facebook app on my DHD. First, I don't get any notifications when someone sends me a message or comments etc when I know my 'notification settings' is checked. Second is abit general: how do I share a video/post through this app? I mean when I'm using the app and I like a video or a post and want to share it but I do not see any options for doing it. Is it by default or I need some tweaking to do?