Need help - Weight distribution hitch installation pics

Heard back from the manufacturer of the WDH, the impression he got is the rare axles seem squat too much(not lifted up due to insufficient weight distributed). 

Here are his suggestions. 
- The hitch ball needs 7 degree towards the trailer
- Hanger needs to be 1 hole up
- The hanger's direction needs a bit adjustment(to allow the spring bar resting on both end of the hanger)

Will give it a try soon.