My main inventory is regularly scrambled on zoning. This seems to be related to the presense of no-drop items. The items before the no-drop are stable, but the items after it are scrambled.

To fix: bag your no-drop items, /terminate, loot your remains in the order you want them to be, unbag your no-drops and put them at the end of your inventory. If you want your no-drops up front, sorry, not possible.