I'm at my office so I can't log in the game to take some screenshots but here's the visual bug I realized yesterday.
At the Arumic Merchant NPC in Junon, Flame Wand (lv.65) & Thunder Wand (lv.73) exchange their color.
According to Artisan's skill: Flame Wand is red & Thunder Wand is orange (That's common sense isn't it?) but they appear to be orange & red at NPC respectively. (Flame is orange while Thunder is red).