Thanks so much for checking Leon.
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.
Didn't see a "reset" option, only "clear".
Image may be NSFW.
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That one didn't produce any additional alerts.
If so, Halloween was only a couple of days ago, so there may be a few exorcists left in town... and alive.
In the middle of Hollywood? You betcha. Thanks for pointing me in the right direction.