Hi! Transmission/TX/Dialer Delay is a setting that is described in this thread.
What it does is delay the forwarding of alarm events to the professional monitoring station. It doesn’t delay signals being sent to Alarm.com. Crash and Smash is not affected by use of dialer delay, as Alarm.com is still looking for the pending alarm or disarm.
You def should see a Pending Alarm in history if one occurred.
Can you test this scenario again and disarm within the TX delay 30 seconds? You should see a Pending Alarm in history followed by a disarm.