[Imp]

I think its to show roughly where it came from as would get a rough idea from smoke generated which often appears if shoots twice, depending on the level of zoom you can miss it. If you adjust the speed units are shown (graphics delay setting I think cant remember) to as fast as can see whats going on you get a quick glimpse so its hard to place it unless its sitting in an obvious terrain feature. Playing with hex grid off helps in roughly equal proportions, I have little idea where it came from just the direction, a rough idea or know where it is within a hex or to. If it fires again even without generating smoke I can normaly get a good fix on its position so it should move.
Adjusting the graphics settings speeds up play & replays & is dependant on your computers speed so you should adjust to a sensible level. Top end in fact probably most new ones need it slowing down or units leap across the map.

Your Campaign looks good.