Spell scrolls are only one shot wonders, so will only have the 1 charge on there. By just having the one charge there and you tick it off, its to show you used it. In the haste of it being used many forget that they have it, so having it used means it cant be done so later by mistake.
As to the Healers kit, just go into the Notes side of the item and put in how many times you have used it for the time being... I doubt its something that is anywhere near the top of the 'to-do' list
Spell Scrolls have 1 charge but are instantly consumed...Healers kits have 0 charges but should have 10. Maybe this could be changed?
Spell scrolls are only one shot wonders, so will only have the 1 charge on there. By just having the one charge there and you tick it off, its to show you used it. In the haste of it being used many forget that they have it, so having it used means it cant be done so later by mistake.
As to the Healers kit, just go into the Notes side of the item and put in how many times you have used it for the time being... I doubt its something that is anywhere near the top of the 'to-do' list