In the action center, I can change the Notification sound for many apps including whatsapp. Now that Whatsapp is back in the store with the new update, i can go to the app's settings and change the notification tones (message notifications and group notifications). What's the difference between the 2 (whatsapp sound and the action center sound of whatsapp)? If I receive a msg from a contact I still hear the sound set from the action center and not from the app itself. Any help?