If I have 1000 lbs on tongue and overall weight at 8000 then it would be 12.5%. I wouldn't of assumed just 2 inches higher would cause it but I am also wondering if since its such a big flat surface on top if the wind pushing the top of the trailer is making it where I do need more tongue weight to counter. I just went and checked tires they are max setting of 44 psi and one was 37 and other was 40. which before I leave I was going to make sure all tires even on the trailer were exact. I know the trailer were only 1 or 2 psi lower than max when I checked other week. I just hope dropping trailer to level or lower with hitch and having at least one friction sway will help it.