With a trailer that you can lift you observe that it is hard to lift the tongue off the ground, but when the tongue is way up in the air it is super easy to lift, and at some point (on single axle) you reach a teetering point (balance point) where the weight is perfectly balanced on the axle (half front, half rear).
The nose-down idea is to favor putting more weight forward vs putting it to the rear. A rear-heavy trailer will sway, but a nose heavy trailer will only put more weight on the TV.
Up or down one hole (2 inches?) is not a big deal and has minimal effect, but nose down if in doubt.
Nose down will give you more clearance for the rear bumper of the trailer as a bonus, but possibly less clearance at the hitch.
on tandem axle trailer nose down will put more weight on the front axles and will handle better then weight on the rear one.