Hilton has certainly been nicer than they had to be, since I have now figured out that the stay didn't qualify.
From Hilton (Flyertalk desk): Thank you for your email.
The stay in question is not eligible due to the form of payment. Any stays that are paid in full to a 3rd party (such as a travel agency) and the hotel is not paid directly, are not eligible for stay credit as the name on the HHonors account must be the same as the registered and paying guest. Mrs. Rebelyell is not shown as the paying guest because the room was paid on a direct bill to Expedia. Please view additional details regarding ineligible stays at:
http://hhonors1.hilton.com/en_US/hh/...rual_of_points
I have credited this account to Mrs. Rebelyell’s Hilton HHonors account as a one-time exception. If you need further assistance regarding your Hilton HHonors account in the future, please contact the HHonors Customer Care center at 1(800)548-8690 as the individual hotel properties do not have the ability to access your account to assist you.
And my response: After posting back and forth on the Flyertalk board last night I had figured out that the problem was that my wife had paid for the room through Expedia rather than at the front desk. You have been very kind to credit her account, and we now know how to prevent the problem in the future.
Thank you again for your help!