Newsfeed on the new facebook beta

[Azurus]

I don't know if anyone noticed this but it seems that we don't have control over what kind of newsfeed we are viewing on the new facebook beta app. the app is amazing but we cant choose whether we want to view "most recent" newsfeed or "top stories" newsfeed
in my case my newsfeed is set to "most recent" as default and I cant change it
any idea how to fix this problem ?