Originally Posted by
aero219
...I called the MP desk, but they said I should follow up with the actual hotel I stayed at. That can't be right, can it? ...
Yes that is right
Originally Posted by
aero219
...Since United Hotels asks for your MP number when you make the booking? ...
It is the stay that generates the miles, not the booking. When checking in with the hotel make sure they have the appropriate account information to credit the stay.
Also realize "United Hotels" is not a United Airline owned operation but rather an affiliated third party (Hotels.com)