I have a very confusing problem, and hopefully someone here can help me.
I have setup a few alerts in the Advanced Alert Manager

I have these alerts set to email and/or text. When I test the alerts, everything works fine. Emails and texts flow as expected.
However, when a node actually goes down, nothing happens.
For instance, I took a non-essential server down, and when I look at the Current Events in the Alert Manager I see:

But, when I look in Active Alerts in the Alert manager I see:

No emails or texts are sent.
Please help.