I'm new to the Phenom 3000, but I've had no problem with the G1000 on other planes. When I enter a flight plan I always enter my departure airport first. I then continue adding way points. Randomly, after entering a way point, it will remove the departure airport from the list, showing only the way point I added so far. I tried this with 2 different flight plans and had the same problem both times. What am I doing wrong?