On the same page, iTunes tells me that I have and have not already purchased Family Guy season 1. NONE of my iTunes TV show purchases show up as purchased, nor can I access them on my Apple TV without having to navigate through the store and "buy" each episode again (it lets me download them for free). Is there a way to fix this?
I was having the same issues with iTunes movie purchases but found that I had to manually unhide them. In this case however, that option is not available to me because my content doesn't even show up as purchased.