Other mistake: For enemies wearing hats, except those with metal helmets, if you shoot the hat, even at an angle where it would still hit the head, the bullet won't pass through simple cloth and won't hurt the enemy. The hat just flies off. The exception is when using guns like the Cougar Magnum or PC 90 that pass through walls and doors.
Other mistake: In the Jungle level you fight Xenia. Before she gets to you, she or you have to cross a rope bridge over a canyon. Xenia cannot see over the sides, despite it being just a rope bridge. You can stand to the side and just blast away at her as she crosses and she can't see you till she's on your side. If you move to the opening of the bridge, she can suddenly see you and will start shooting. But she can't see past the sides of the bridge.
Other mistake: Some weapons, Bond is able to dual wield. Like some pistols or sub machine guns. But he can only have two of the same weapon if he kills an enemy that has two of the same weapon. You can't have a gun, kill an enemy with the same gun, and pick it up as well. You only collect the ammo. Like in the Bunker Levels when the alarm is sounded. Some enemies will have two DD44 pistols. You can kill this enemy and pick both DD44s and dual wield them like he did. But if you kill an enemy with just one, then kill another enemy with just one and pick up both guns, Bond only shoots with one.