2nd Time in Event trigger ?
 

I'm trying to setup a situation where a group of 40 enemies will respawn 1 time (for a total of 80)and so when a total of 60 enemy are dead, I want an action to happen.

I tried a trigger in the MED:
If group had lost 60 units then something, but it did not trigger.

Is it because it is the second time around and so there are only 40 total again?
What is the 2nd Time trigger about ?
I thought maybe I could use a combination of lost 30 units and 2nd time (to total to 60) ?