I finally managed to find the feet of my amplifier and the rest of the equipment so I took them off the wall were it was hanging beside the line array. It did clean up the right side response but it's still a little rougher than the left side. It seems the damping on the left side-wall really helps there. I have received warning though that I may not place more damping panels in the room . So for now this seems the best I can do to get both sides as similar as possible:
Red is right, blue is left... 1/12 octave smoothing...
That is one heck of a response curve.