Nose down is always better than perfect level. Also loading the TT is just as important as how it sits.Added weight needs to be placed over the axles or in front of the axles if at all possible.
Over time we keep adding stuff to the trailer and you need to consider where it's placed and how it affects tongue weight. Any pound added behind the axles removes some tongue weight, it's beam geometry. The axles are the pivot point on the beam. The distance to the tongue is one resistance distance, the distance behind the axles is the second resistance distance. Perfect weight distribution on the beam = zero tongue weight. The design is to keep a percentage of the weight positive on the front end, this is called tongue weight. When you add weight behind the axle you change the percentage.
So, it's possible that you messed up your setup by moving the hitch up and it's also possible that moving it back down will not help you if you also added to much weight behind the axle.
I hope this helps
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2016 36FBTS Pinnacle
2016 F350, 6.7, 4x4, DRW, long bed
B & W Companion 5th wheel Hitch