If I don't clear the pop ups from the triggers right away (e.g. if I'm away from the computer) I start getting internal stack error boxes, which pop up faster than I can click them. I have to exit Evo at that point.

I deleted all of my old triggers and re entered them and they seems to work better. I don't think it liked the old EFP triggers. However, if I don't respond to the trigger right away I still get the internal stack errors. Here's how it happens...
 
While I'm not in front of the computer, the trigger pops up. If I don't respond within 1 minutes, the event fires again. When I do come back and acknowledge the pop-up by clicking OK, both the alert and the list of triggers go away. When the next trigger interval comes around, instead of a pop-up I get internal stack errors.