Action Conditions Partially Working in 1.6.8

[js1]

I have the following two actions:

Action 1

Conditions:
Host group = "HostGroup1"
Host group = "HostGroup2"
Host group = "HostGroup3"
Trigger severity <= "Average"

Operations:
Send message to Group "UserGroup1"

Action 2

Conditions:
Host group = "HostGroup4"

Operations:
Send message to User "UserA"
Send message to User "UserB"

When a trigger of Status=Problem and Severity=Warning from HostGroup4 triggers, Action 1 takes place and spams everybody in UserGroup1, but HostGroup4 is not defined in Action 1. On recovery (Status=OK), Action 2 takes place as expected. As the conditions are written, triggers from HostGroup4 should only ever hit Action 2, never Action 1.

How can I further debug this?