Current behavior: A single copy of, for example, an antidote potion - in a Quickslot occasionally displays as having charges, like a Wand. I have also experienced this behavior with Potions of Defense.
Not sure why this happens. May occur when a character has used a copy of the item before, and a new individual single copy of the item is latter added to the same quickslot. Possible it has something to do with stacking items inside a Potion Case.
Expected behavior: Potions should not display as having charges.