Since I operate a lot of flights to the east coast of the US, I recently started to serve the three airports surrounding Washington DC (DCA, IAD, BWI). While BWI is located in Maryland, DCA and IAD are located in Virgina. However, in game DCA and IAD are associated to the "Washington DC" region - which I guess is the representation of the District of Columbia.
I know this is only minor cosmetics, but I wonder whether this allocation has been made on purpose (e.g. to better reflect international traffic streams) or just by accident.