I noticed that when you save while a unit is receiving boosted stats, that boost is saved as the unit's base stats, so that when the game is reloaded those boosts become permanent, even once the unit leaves the boost radius. This also means that while that unit returns to the same boost radius, another boost is applied on top of the previous (now permanent) boost.
For Example:
Unit A Base Armor: 50
Unit A is in an Attack boost radius so: 50+50
Save game
When reloaded Unit A Base Armor: 100 (should be 50)
After saving, when Unit A is in the Attack boost radius: 100+50
When Unit A leaves boost radius armor returns to 100 (should return back to 50)
Unit A now permanently have more armor than it should.
Extra Computer Info:
Laptop Windows 7, 8 gigs ram, Nvidia Geforce card, Intel I7