I got nothing. While resetting an alert WILL cause it to trigger again, you changed the value so that it SHOULDN'T have triggered again.
The only other thing I can think of is to select the alert, click "reset" to ensure that all nodes for that alert are now in a "cleared" state, and see if it fires again.
If so, Halloween was only a couple of days ago, so there may be a few exorcists left in town... and alive.