I've been using the Messenger app for all SMS and FB messages. Recently (as in this morning) I started getting my regular ding for a new message, followed afterwards by the verizon default notification sound. I can't figure out if it's the "chat heads active" notification (side note: is there a way to kill that? worse notification ever) or what. I have gone through and made sure all the other messaging apps have notifications set to off. Any ideas?