HAHA yes they are not fighting but instead the one is peeing on the other ones forehead
mmm they should be fine. If the damage to one gets too bad you should seperate them. If this is not an option make a divider for them. You will be overstocked like rallysman says in a few months. For right now you are fine though.
i wuld personally move everyhting thing around in the tank, then that would neutralise the territory of the fish, and add some dither fish like giant danios, to share out aggression..