Low level auto discovery seems to mess up sometimes and associates multiple items and triggers to the wrong host.
In the attachment you can see the dev01 server has items and triggers from rfx servers.. this is creating multiple notifications (that's how I noticed it)
It has happened other times as well. I think clearing and re-linking the template solves the problem.
I believe the problem generated when I lowered the "Keep lost resources period (in days)" to 0, thinking it would remove the items that I had laying around that I was not interested in any more.
I will leave it in this state in case you want me to do some tests.