Unable to buy multiple boots enchant

For example I have 3 sorcerer boots, Because of the condensed recipe for changing boots enchantments it completely broke buying multiple enchants for different boots. The only purpose for having multiple boots are the sorcerer boots non unique 15 magic pen, however because of the current recipe you are unable to have more than 1 enchant for the same type of boot.

For example I have 3 sorcerer boots but I can only have 1 enchant out of the 3