It should be calculating all aggro effects. Can you share a print of your AGGRO effects?
Are you using more than one 'AGGRO: value' in the same effect? Each instance of AGGRO must be in a different effect, so:
https://i.imgur.com/f4ozvcF.png
this would work because it's two different instances of AGGRO in different effects.
https://i.imgur.com/ORVVvvw.png
This would only return the first instance of AGGRO in the same effect.
(Nevermind the Allosaurus attacking itself on screenshots...i'm testing a new feature :P)

