Ah - yes - I should not have said it all hangs from the waistband without putting in that it hangs according to how I place it to give that illusion.
The kilts with the most obviously untailored look are, by my craft and the use of skills, pulled and twisted into shape, there are shortenings done on the inner folds to pull pleats inwards, so the outer folds do not roll open, some pleats are pulled up or down by a small part of an inch so that the hems do not droop below the level o the rest - it is how to curve a 2 dimensional fabric to fit around a three dimensional object at the top and then fall as required when abandoned to air and gravity.

Behind the pleats, partly enclosed in the waistband is a strip of the stuff used for harnesses, like seatbelts. When placed on edge in a ring it doesn't allow for movement up and down, so it supports everything on one level - I am constructed so that there is a gap at the back over my spine about the width of a hand - which is why the reverse Kingussie style of kilt suits me so well - but it requires the sturdy support which the webbing provides, and it then goes on to help with all the rest of the kilt staying level.