Look here. :)
If you are using a round bar hitch, you need to have a minimum of 5 links under tension between the snap-up hooks and the bars. Your bars are pointing upwards which means that you need to put a washer or two more on the pin in the hitch head (or whatever type of adjustment it requires) to tilt it back towards the trailer a bit. This will level out the bars which should run parallel to the A frame when hooked up. Doing this will probably require that you let out the chain about one link - which is good - to keep the weight distribution about the same. The reason for the bars being parallel to the frame (round bar systems) is so they don't crash into the frame or snap-ups when making turns as they move back and forth. It also keeps the tension on the chains even in both directions during turns. The reason for the 5 link minimum is to keep the chains from dragging the snap-ups on the A frame during turns and the tension even.
Barney