I have been going through the learning curve of getting these to work properly as well. Combined with mis-information and my own experiences it is coming together.
I've learned to drop the front inner legs eight or so holes, then deploy the jacks. there has to be enough room for up and down movement on the leveling jacks after the truck has been removed and the front of the trailer lowered. Then I just gauge how far to lowered the inner rear jacks based on how far away from the ground they are, again leaving them far enough up to allow 4-5 inches of auto - jack movement in both up and down directions.
If it's a little off-level side to side I use 1 or 2 leveling block as required!
2014 Crusader 351 REQ Touring Edition (the Cottage)
2015 GMC Sierra 3500HD SLT (Allison B)
Nights in the Cottage: 2014:
Jan= 2, Feb=2, Mar=2, Apr=3, May=2, June=8, July=10, Aug=11, Sept=2, Oct=2 Running Total: