Please let the Research Team know in the discord server (channel #orna-guide) if the assessment is off for any item (preferably in-game item screenshots of the unleveled item, not of the guide's assess). For any other problems, contact Veratil.
Note that 170% is a crossover point of Ornate and Legendary qualities. You can have 170% Ornate or Legendary. Because of this 170% has been set to show as Legendary.