Separate ranged

For example, Railroad gun. Railroad gun mixed with other units. It is good while it attacks from afar, but moving(also attacking) is also having the same damage attack from far away even though it is close combat(if is not idling and not defending). Making the ranged units overpowered.

The description of ranged units says that be aware when fighting close combat units. Instead of be aware encountering close combat units, ranged units are like armored cars with ranged attack, all-in-one.

So I guess the damage from afar and close combat damage especially ranged units should be separate and different from battle of close combats.