I agree with Huntindog above. The hitch head should have been tilted rearward more to add more tension to the WD bars when they are drawn up with the straps or chains.
That is one of the basic adjustments on the WD hitch. You adjust the tilt of the hitch head so the WD bars point downward before drawing them up. It takes some trial and error to find exactly the right angle and height to draw them up. The more they are pitched downward before tensioning, the more WD you will get when they are tensioned or drawn up any given amount.
Barney
