Check your profile to see what you have checked off as your choices. You have the option of double dipping with a set number of miles (100 for Hampton and 500 for all other Hilton product), or you can select to double dipp with 1 mile per dollar spent. I also have noticed that after the posting for my stay, my account will refelct and indicate the 1 mile per dollar option. But when it does post to my Airline account, I do get the 100 or 500 miles, depending on my Hotel selection.