Other mistake: When Robert the Bruce returns to the battlefield at Falkirk, there are 2 children supposedly crying over a loved one. If you look at the blonde girl she is actually laughing. (02:12:00)
Other mistake: In the scene around the camp fire, Rob Roy can be clearly seen with with plasters on his hand.
Other mistake: During the river chase scene the NVA mortarmen drops a round into the tube and you can see it bounce right back out before the special effect that makes it look like the Mortar is firing.