Wow, I just took a real look at that box, that shit is wild man, too many wires under those breakers. You have 3 circuits, I think you suspect you have 4 with the double pole, yet you have 7 or 8 wires total coming into the box. Wire each device together on each circuit and bring one wire into the box, go buy 2 20amp breakers, then you got 4 20 amp circuits. One hot wire under the breaker screw, one neutral to the busbar, one ground to the same busbar for each circuit. If you got 4 circuits, there should be only 4 separate runs of cable coming into that box. I know it probably works, but I dont think you should do that.