I've been seeing this for awhile now, and it is annoying. If I enter a destination and date range on the Hilton home page and get back results that list all the available properties at the destination (say Singapore), it will show the available hotels, and "Honors Discount" price prominently.

However, when I select to Book a Room at any of the properties, the standard Honors Discount is always higher for the lowest price room. Sure, if you select to see more prices from $xxx, the original Honors Discount from the previous list page is available as the "Honors Advance Purchase Discount".

A tad misleading (and definitely annoying) IMHO since it is not clear from the initial price "pitch" on the list of hotels page. And at times the difference between the regular Honors Discount and the Honors Advanced Purchased Discount can be quite substantial, but not consistent between properties, so you need to click on all properties to see the delta to make the best value decision.