Check your CC statement and you should see the property actually processed the advanced payment and not Hilton. The FDC probably ran your CC for approval in case of incidentals and should show as pending. Your folio should show an initial credit on the account with charges making up the stay expenses. Any difference should be charged to your card. If there were no incidentals the authorization should cycle off.
This is a good reason to not use a debit card at a hotel as that's money out of your account until it posts or clears. As it is, it's a reduction of your credit line.