Re: What Alerts Could Trigger on Node X?

Are you using the Scope section of the alert's Trigger Condition to filter the custom properties, or are you putting all of your filter values in the Actual Trigger Condition section of the Trigger Condition page?  The "All Alerts this Object Can Trigger" widget relies on the Scope section of Trigger Conditions.  If you don't properly use those, you won't get accurate data.