Hello, happy to help! In both circumstances the event was impacted by the speed of the disarming. In short, disarm events are forwarded to the monitoring station as abort signals. To limit accidental dispatch for false alarms, these disarm events are accepted as report of false alarm, and the event will be dismissed.
Both of the alarms you referenced were disarmed within 4-5 seconds, before operators processed the alarm to make a call, thus it was dismissed.
Read more about this policy here, and details on changing it if you wish.
FYI, your system is using a 3G cellular module which will cease functioning next year at the 3G service sunset, and will possibly see signaling impacts leading up to that sunset. See recommendations in the System Manager here.