On the British side, Gage is replaced by Howe, who is then replaced by Clinton. Each time this happens, the general is transported to the largest army on the map.
This interferes with the planning of the player, and is annoying and unnecessary. Please leave the generals where they are when they are promoted. Chances are, the player put them there for a reason! There is no good reason for the game to magically transport Howe or Clinton from state to state just because they were promoted.