Group PM Notifications on Mobile

So I checked BZPower on mobile today, and noticed that new replies in group PMs don't make a notification under the "Messenger" section of the mobile menu.
 

• Mobile menu: http://www.majhost.c...10-12-22-08.png
• "Notifications" section: http://www.majhost.c...10-12-21-51.png
• "Messenger" section: http://www.majhost.c...10-12-23-53.png

On mobile, it does put replies to one-on-one conversations in both the Messenger and the Notifications, but on group PMs, it doesn't seem to notify me in the Messenger at all.