Well i told Leo about this and all he said was Oops but i have no idea if he found the problem but when a shell lands on a building with units in it does not crit the inf in the building.
instead of killing the whole squad it only killed 2 guys out of 4.
I went trough the Update history and found this
Churchill AVRE will only building crit infantry if the shell lands on, or very near the building
Think you guys accidentally fucked up.