Door lock and EV mod

I have both installed as well and I noticed something interesting:

After startup, if I turn on the headlights while still pressing the brake pedal, the doorlock activates immediately. I had this happen to me a few weeks back and today tried to recreate the event.
If the lights were on before startup, the lock behaved normally. If I release the brake before turning on the lights, the lock behaved normally. But if I startup, hold the brake and turn on the lights, the doors lock immediately.

I can only think of two causes for this:
1) Coastal felt it safer to lock the doors immediately when it is dark out.
2) There is a spuriuos signal being generated on the wire controlling the lock mod when the listed conditions occur.

Either way, I agree, these are great additions to an already awesome car.