This site is being deprecated.
Please see the official X‑Plane Support page for help.
Since X-Plane 10.45 we've also been excluding by ICAO code. You may be seeing a benefit of that. My understanding is that the order of airports listed in the scenery_packs.ini file still matters. Global airports should be below any custom airport scenery but above any base meshes.
This site is no longer being actively maintained.