Family guy season 10 !?!?!?

how comes family guy season 10 is out on dvd http://hmv.com/hmvweb/displayProductDetails.do?ctx=280;-1;-1;-1;-1&sku=113749 but on websites such as imdb.co.uk season 10 hasnt even been created and on tv channels such as bbc three the episodes are for season 9 ? so why is this