For enchantment I'm not sure but I guess few were too powerful compared to their level, for example +100 magic damage as level 3 enchantment (this one is not true but just an example).
Also you could find weapons with very high level enchantments early in the game.
For empty containers in some occasion you can mindread people and this gives you access to their container which were empty although they "tell" you that they hide something there.
Imarion
