Unless...
"airlines, car rental agencies, hotels, motels, inns, and resorts, steamship/cruise lines, and travel agencies" (emphasis mine). It would seem that if you run a purchase through a travel agency instead of buying direct, you get the extra points. That's...pretty perverse. Looks like it's time to talk with a friend in that business...
(And a note: If you have that MCC in use, it looks like that would theoretically cover PV stuff as well)