Why did I get multiple email (or voice) notifications for a single alarm?
If you are receiving multiple notifications for the same alarm, the Global Option to to remove duplication notifications to the same recipient may be unchecked. This setting can be found in "Global Options" under the Notification tab.
If duplicate recipients are allowed, multiple notifications may be a result of Tag Group notifications combined with individual alarm notifications.
You can define notification for a Tag Group, and this notification applies, by default, to all tags/rows in the Tag Group. You can also define notification at the tag/row level (on the Alarms and Limits screen) for each alarm condition.
If both are defined, you may receive two notifications for a single alarm: one for the Tag Group, one for the tag/row.