Changing some entries in the config files, have no affect, unless you have state retention off. YOu should use the web interface to turn off notifications, since nagios has “memorized” your previous settings.
Clik on the host/service that you don’t want notifications from, and then clik on the “disable notifications” link. YOu may have to “enable” then “disable”. But now that you have done that, you will not get any notifications from that service.
For an explanation as to why, see the docs.
nagios.sourceforge.net/docs/1_0/ … tion_notes