First turn, destroyed?

[Wdll]

I am in the middle of a generated campaign, assault mission. After finishing with the deployment I click start and the enemy artillery starts firing without hitting anything. While watching the enemy artillery firing I see there are several red marks on the mini map, all that is normal of course.
So, enemy artillery stops firing and I click on start turn. First thing I notice is that perhaps half the red marks have dissapeared from the mini map, thinking that the AI just moved them I wasn't worried, but when I moved the map to look at the units still spotted I noticed several BMP-23A units that when I moved the cursor over them it said "destroyed". For all of the BMP-23As there! There are other enemy units that are fine, but not these BMPs. When I right click on them it still says destroyed. My units haven't fired at any of them yet and I haven't used any artillery or aircraft yet.
What am I missing?