How can I alert on a MultiValue Statistic?

I'm using the built in MongoDB (Windows) template with the latest SAM.  We simply want to alert based on either the Data Size or the File Size of the MongDB being greater than 800MB.

I think I have the trigger setup correctly -- but I can't be for sure, because I'm only getting the RESET action of the alert (email) every time the condition is checked.  Also, simply trying to view the data via Alert Variables is tricky because the component is a MultiValue Statistic, which is a string of values for the component i'm monitoring.

1. How can I verify the trigger is setup correctly?  I basically want to see in my Alert Variables that either Data Size or File Size is greater than 800MB.
2. Why am I getting a RESET message only??  It continuously comes in when the alert is enabled.

Screenshot of the alert trigger and alert variables are below.

Thanks!