I am having a similar problem. I am on a Mac playing the demo of Battle for Normandy. I'm doing the Busting the Bocage. I tried to call in a point target on that antitank gun (the red X) and it landed where you see the red "O" and some of them were going off the map. I 'adjusted' the mission basically to target the same point I had originally targeted, and it moved it to the place I marked "off map?" in red. The smoke from the howitzers at left of the image was slightly off, but the other smokes were basically correct. In playing the original PC version, I never had quite this problem with the artillery being continually further off the target no matter what adjusting you do. This is not just random failure to communicate, - bad spotting, random AI behavior. This strikes me as a bug, where even if your spotter does correct the location of the barrage, they aim further from where the spotter tells it to go. It's like in the equation they use to calculate where the impacts ought to be, they've switched a positive for a negative, or something.