Frequency: Always
World name: Cactuar
Character name: Lunie Khit
Party or solo: Solo
Area and coordinates: Inn rooms in Gridania, Limsa Lominsa, Goblet, and Shirogane; where Glamour Dresser are.
Steps:
1. Acquire two pieces of dye of any color
2. Interact with Glamour Dresser
3. Click on "Edit Glamour Plates"
4. Choose a glamour plate number
5. Enter two pieces of equipment that can be dyed into any two slots
6. Reflect dye onto the first piece of equipment
7. Click "Save", then click "Yes". Note how the dye has already been consumed at this point.
8. Reflect dye onto the second piece of equipment
9. Click "Save". The dresser is now asking again for the dye that you applied onto the first piece of equipment.

Some additional information:
* The bug does not happen if, after saving your first set of dyes, you close the Glamour Plate Creation window before applying your next set of dyes.
* If you have dyed multiple glamour pieces prior to the first save, after you dye other glamour pieces and save again, the game will prompt you to use up the same mutliple dyes reflected prior to your first save in addition to the dyes reflected after the first save.