Lumia 1320 :: Why Aren't App Notifications Showing In Action Center

What is happening: Notifications like photo comments, tags, favorites, likes, game notifications are not showing up under the action center. This is happening for a certain number of applications (Facebook, Twitter, Path, 6tag, etc). Mostly, none native applications. Only native applications and a few third party applications are showing up in the Action Center as well in the Settings under 'Notifications+Actions.'

What I have tried to do to resolve the issue: I have uninstalled the applications, reboot the phone, reinstalled the applications, checked the settings of the applications itself (eg. checked facebook settings for notifications - they were on). And lastly, restarted/refreshed/formatted the phone. Also, I tried to remove those icons from the lockscreen for their corresponding applications (I've read that somewhere in MS Answers), they said application notifications will only show if they are allowed to run in the background (check) and if they are not included in the Quick Status for the Lockscreen (check).

What I got on my hands: I have a lumia 1320 running the latest firmware available from MS/Nokia, Lumia Denim. I have a 16gb micro SD card in the phone.