On mission 8, the air units are still coming from the wrong direction (i.e., not from the side opposite to your base); on mission 10 (IIRC), the same happens. It's quite frustrating to have carefully placed your shields and AA just to find out the air units are coming from another side =(
And, most frustrating of all, there doesn't seem to be any kind of savegame. Yesterday I made it to mission 11 or 12; today I logged in and found out I would have to start it all over again, from square one =/
 "Desert Moon"){kind=icon}
 "Canyon Defense 2"){kind=icon}