I talked with a programmer and your call stacks are coming back as a video driver crash. Try updating your video card drivers or rolling back to a later version (if you're up to date)
It isn't a bug. Just an issue with units stacking up when turning corners or in cover. If a zook or panzershrek lands right it can wipe out entire squads, like the projectile travels through and hits them all or something.
From what i know its quite easy to stack buff on usf infantry via entering/exiting any vehicle under FHQ buff. On top of that it possible to stack buff on team weapons via killing gun crew under buff to re-crew it again (buff applies to the gun, not the crew, so every time weapon re-crewed, it gains stats increase).
1 & 2 - Added Issue to our Database
3. - Fixed and on route for the Oct Patch
4. - Added Issue to our database
5 & 6 - Issue are already in our database
7. Added Issue to our database