With ORION it is possible to receive such late notifications.
So when alert was created (at 09/08) you was notified, but nobody closed alert.
So now, when triggered condition becomes no longer active (at 11/15), ORION post a note to the same alert.
If triggered condition again becomes valid and original alert are not closed, ORION will submit message "alert was re-activated" to the same alert also.
Also there can be scenario if issue occur at some time, when connection AlertCentral-ORION was not available.
So note ("alert not longer active" / "alert was re-activated") will be added when both instances will be reconnected (if some instance was down, or problems with network then delay can be also significant).
would this occur even if I'd "closed" all tickets? I've done that several times prior to this occurring.
Also, I don't seem to get getting the alerts from NOW that I should.
you are correct, I closed and now showing up correctly. very interesting. I was selecting all, but it must not have been active/in "queue" at the time.