Me again.
In the Soldier Record:
It seems the listings for Kills and Missions reset every month. (Click on the kills button to see list of kills by weapon, of alien type, of alien rank. Click on the missions button to see missions by location, type, ufo.)
Only the last mission of the previous month appears to match up with mission details info box. The previous two appear in the mission details info box, but their stats aren't in the other Soldier record screens.
Save attached.
I really like this mod, so you'll most likely be hearing from me lots as I find stuff.