1. It depends since there is no published match schedule but most likely Diamond
2. Correct, once you pair a device that's it. Your status doesn't have any difference in how much it might cost but will depend on whether you want "browse" or "browse & stream". Figure about $100 (but if you log into your reservation you can see)
3. $14.50 per night, per person, but that can always change
4. Huh? There are 2 in your room, you can get more. Just don't be one of those "expletive redacted" guests who leave them in Cozumel, Costa Maya, etc because they don't want to drag a wet sandy towel back to the ship.