I tow 9700 (and high change) lbs, lets call it 9800 lbs with a Ram 1500. The dealer set up the hitch and I suffered from a little sway that made me uncomfortable. I dropped the hitch head 1" and changed the angle slightly and it tows like a champ now even if I'm being passed by a large truck.
my tounge weight went from 917lbs to 1048lbs. I use a Reese pro series with 1400 lb bars, I have 2 sway bars, and airlift bags on the truck. My truck is properly equiped to tow 10,400 from the factory.
In the first pic it looks to me like you are a little nose high on the trailer.
So, proper set up is the key.