The paid ads and ad words are all labeled "sponsored links" and it's difficult to differentiate between them. Is Google listing the top ad word with the paid ads when there are not enough paid ads for a particular search term?
>Adwords boxes have borders. Premium Sponsorships don't.
The #1 Adword is being listed directly below the Premium Sponsorship listing at the top of the page in the same size box/banner. Both of these listings are in colored boxes without borders and with "Sponsored Listing" in the upper right hand corner of the box.