Equipping identical items

[Ian]

[HP=69/MA=16]:i
You are carrying padded cap (Head), wool gloves (Hands), cloth shoes (Feet),
plain linen tunic (Torso), club (Weapon Hand), copper ore, cloth shoes
You have no keys.
Wealth: 0 copper farthings
Encumbrance: 520/3600 - None [14%]
[HP=69/MA=16]:eq shoe
You have removed cloth shoes.
You are now wearing cloth shoes.

This shouldn't have happened.