In shop menu, unidentifed potions listed using true name, not colour name

I have 2 pink potions and 2 mauve potions and 2 identified gentle potions. My other potions, I have either more or less than 2 of each.

I can tell in the shopkeepers menu that I have 2 mysterious potions, 2 blinding potions and 2 gentle potions. That's useful to know on the 4th floor with medusa coming up on floor 5, But when I check inventory or the drink menu they still show as pink or mauve.