A few issues: Your API call is hitting category 6445, the "equivalent" web link is hitting 6001. I see 4 results at the website in Chrome and 22 in Firefox. After clearing cookies I see 22 in Chrome. So AGAIN there's some mishandling of results based on cookies. Maybe your 92 is due to cookies? But the 22 still doesn't match. I don't see a pattern to it. Can't think of a default that would cause this. Searching all ListingTypes and WorldWide doesn't change it.