..... So if your vehicle has been sitting, that's not a good measurement to use.
And it makes the WDH adjustment more difficult because every time you make an adjustment to the WDH, the load-leveling wants to correct it.
Many Expy owners don't realize that the "sqwating" when turned off is based on opening the rear hatch. The truck lowers down to aid in rear hatch loading/unloading. I believe it's a setting that can be turned off ("load assist" ??). When I tow the trailer and dry camp for a couple days I leave it hitched, means I cannot open the rear hatch and it never drops an inch. If your system has a leak, that's a whole other can of worms and I'm not touching that with this post.