[jjlucsy]

The 'Notifications" Area in the Settings app is for push/network based notifications, not local. And the badge for an app can be updated either when the app is launched, or through network notifications pushed from an outside source. OmniGroup has no servers to push this information. Local notifications are ways to emulate the network push without actually having a server. They originate only from the app.
Does that make sense? Its a subtle point that Apple doesn't really make clear and relies on the app makers to clarify.