welcome to webmasterworld, hope you enjoy it as much as the rest of us.
in regards to google adwords/premium listings, some strange things have been taking place over the last few days, such as multiple ads from same advertiser etc.
also the 1st batch of CPC only premium listings are kicking in as the previous CPM advertisers contracts are coming to an end.
hopefully things should get a bit clearer in due course, or alternatively we may get some information from Googles advertising dept.
once again welcome to Webmasterworld.
Shak