Well, that's old missions created with a version far far in the past. I think they are broken.
But this is just a guess.
I'm not very interested in DCS at the moment. Lately my son was born. In the short remaining free time my wife and I have, we are playing Minecraft together.
I will not edit or redo this missions. I have spend far to many time in this editor.
It's time that someone else builds good multiplayer missions.