This might help you out.
This is how I have my modes setup and HSM/RM to manage arming/disarming.
These are my modes. They are set by time and presence.
When the mode changes to any of the Away - * modes (done by presence), it arms HSM automatically.
Finally, when HSM has changed to Armed Away, it kicks off my Goodbye Home routine in HSM.
When my wife and I arrive home, then mode changes to Home - * (depending on time) and kicks off my Welcome Home routine.
