I receive the alerts for military aircraft on Mode-S. The notification box comes up but the aircraft (military) does not appear in the MyFlights list. All other flights appear in the list as normal. I have no filters on that I can see and it appears that only military flights are affected. For example, I received an alert for a C130, call sign REACH64, registration 96-1005, with a Mode-S address of ADFEA8. However while the alert notification functioned the aircraft did not appear in the MyFlights list. I was sitting at the computer when the alert came in so the aircraft was still in area (i.e. it did not time out and leave the list.) Any help would be appreciated.