Even if you got credit initially, it would probably be removed later. SPG Accounts Integrity regularly runs reports for duplicate stay postings on the same night and removes them because you really cannot spend the night in two places on the same night.
I would try to get the hotel to change the stay date to another time like others have suggested.
Sincerely,
William R. Sanders
Customer Service Coordinator
Starwood Preferred Services
[email protected]