Add to collection problem

I cant add Castlevania Portrait of Ruin to my game collection.

Yes i am from australia and according to gamespot release dates it only comes out on the 20th of april but this information is false.

I just bought it today at my local EB and its also for sale on gameswarehouse.com.au

and its not an import because it has the australian rating system logo on it.

Image link: 

http://img261.imageshack.us/img261/7584/cvcn5.jpg  

Just thought i'd let you guy's know..... :)