Hello there,
Some more info regarding the Airport. As Sari said (at page 6 i think) I was trying today to see the correct direction to land on the runway and i used the autopilot for that. The problem is that i end up at the top of a mountain cause the runway that AI recognize is place in wrong possition http://postimg.org/image/nysryu88j/. im marking you with arrow the direction that aircraft tried to land. ive read about what you said for the airstip and the defaut map location. Hope those infos will help you a little bit more.
Keep up the good work