Yeah, and another thing that bites about it.... whatever options you have for the *main menu*, it will stick to that mission.
Example: Lets say you go to play coop with a few buddies, externals on, map view, show enemies, have some fun, etc. But then you load up your classified mission and when you classified it, externals were off, map view, etc....now you have to exit out, un-classify it, turn those options on again, and then re-classify it.
It's a PITA....main menu options for the overall game should not have any effect on a single mission. There should be some option for that...