Luddgang:
You will probably have to contact Hilton HHonors customer service. I called Citibank and they were useless.
Once I contacted Kristy Hall with Hilton, she squared the problem away like she always does.
For some reason, the points were credited to my account right after my first use and then taken away. I sent Kristy a copy of my bill and she added the 7,500 points.
I'm just thankful that Hilton has such great customer service. If it wasn't for them, AMEX and Citibank would have horned me out of about 15,000 points so far. It's really a darned shame that Hilton has to make up for the shortcomings of the credit card companies with their great customer service...
Falcon56