Check your whole setup again.
Trailer when hooked up level or very slightly nose down. Adjust as necessary by raising or lowering hitch ball.
Equalizer bars parallel to trailer tongue - adjust L brackets if necessary.
Measure front fender height with no trail and with trailer on but no WD hooked up. Then measure with WD hooked up. Fender height should be back to requirement from truck manufacturer - for Fords it should be 1/2 the difference of the first 2 measurements. If it is not adjust using the washers. Ensure all fittings are tightened to torque specs from Equalizer.
I run tires - trailer 50 PSI truck 44 PSI.
After getting this all set unit should tow fine. Mine is similar weight with 1/2 ton truck and 1200 lb bars.
For piece of mind and confirmation weigh at a CAT scale as outlined in other posts here.