Just one other peculiarity that threw me for the longest time till Trapper helped me out.
In the 2% solution, that's 1 mg Iodine and 1.5 mg Iodide only, NOT 1.5 mg KI. The potassium portion of KI isn't accounted for. Maybe they wanted all the focus on the iodine/iodide? Anyway, the potassium portion would be roughly 0.5 mg per drop.