What are you towing with and what are the ratings on that truck? Preferably direct from the door sticker as the websites may not show your exact truck configuration.
Also, what do you mean by "spacing"? I'm guessing, you are measuring the wheel well height or something but just not clear.
Do you have the actual axle weights from each weigh (preferably including a weigh with the WDH disconnected also)?
Something is off on your calculations. 950lb on a 7700lb trailer would be 12.3% hitch weight (or are you implying a 8650lb trailer of which 950lb is on the hitch)...but your summary indicates 20% & 15% hitch weight and if I back calculate, I'm not coming up with 950lb anyway.
As mentioned above, that's a lot of trailer for most SUVs. Now if you have one of the 3/4 ton suburbans, that might be fine...a lot of the lighter duty SUVs will be pretty marginal.