After closer inspection of your pics, It looks like you have your shock set with too much preload and/or length. The rear pod should sit level with the main chassis (ready to run with motor battery and tires). You can trim the ball ends on the shock so that the rear pod doesnt travel so far back. you can have 1-2 degrees of pod "droop" when you pick up on the car and unweight the suspension. Thats about the max.
Also from the looks of it by ordering just one dampener tube, you should be able to fix both of the tubes on your car. Male end on the bent side, female end on the other.
Give that a shot... and Ill grab pix later.