Sunybrook 3008 SLE

so bought a sunnybrook lite 3008 SLe and i have a 2007 ford expedition for towing it. Went out with them both yesterday and have to say the trailer seemed like it was making the truck swerve all over the place, I have the stabilizer and weight reducers.. is there another trick or is that to much trailer for the expedition. The ford is supposed to be able to tow 9100 lbs and the trailer dry is 6100 lbs and i have many at absolute most 1300 lbs of stuff inside.. tongue weight off ?

any ideas would be great