HELP!! Phal has black spots on crown

[Leafmite]

Isopropyl alcohol, a few treatments a day will prevent spread. I would alcohol the main part of the orchid and leaves and pour a little in the crown. It will help keep the bacteria from speading. Cutting the orchid might void warranties but the alcohol won't. Send the picture to the vendor right away. Be nice, first compliment the beauty of the orchid, mention how delighted you were that the spike wasn't hurt, then mention your concern and ask for the opinion on what to do. It probably wasn't present when the orchid was shipped (at least assume it wasn't). By treating the vendor as a friend, you will have better success. Good luck!