Hey I was playing around with making a small cocoa application and using the new Notification Center API in Mountain Lion. However my app is now present in the notification
The following, perhaps heavy-handed approach seems to work for me when I get into this mess. It avoids changing AppID/etc. at least.
rm -rf ~/Library/Developer/Xcode/DerivedData/*killall usernotedkillall NotificationCenterrm ~/Library/Application Support/NotificationCenter/*Reboot/log out is not required in this method.