The logic in the title is not good. The application doesn't know what's intended, just what happens Grenade sticks, so that triggers the bonus damage and medal. The app doesn't care what a design doc says, just the tag on the item and the rules that follow. Now I do find it unbelievable that what they say is true and that they left it for almost two years I guess it is possible that yes, they looked back at original design docs and found some idiot coder made a mistake nobody noticed. But I find that h likely.