I don't have my phone connected through FB as I don't want text messages about anything, so no need for that. Here's the screen shot of the app settings and you'll notice the FB icon in the notbar... that's for someone who just commented on a post of mine.
OK, my settings look exactly the same cept I have mine enabled. But you say you are getting notifications on the phone, not the app, about new comments? Next time that happens, can you take a screen shot too? Thanks again for doing this and quickly too. dancedroid