investigating Unit Direction

[gmangnall]

At mission start the AI Harriers should be heading north as per the not locked.miz. After making some changes I saved the mission and in all subsequent saves the AI Harriers all face south but show a path of 05 degrees in the F2 view. This mission actually has 60+ triggers so has a huge amount of work gone into it....and it's ruined as the aircraft have to start facing north. Is there a way to fix this?

Harrier Locked.miz Harrier not locked.miz

[NineLine]

What method are you using to "lock: the mission?