Facebook app: all my wall posts ever are shown in the notifcations

So I'm a new droid user, i'm really excited to have it. Including have the facebook app. It automatically syncs updates and currently it's telling me i have 1500 wall posts all of them being post i have seen, so nothing really new and not really notifying me of a new post. is there a way to get this down to zero?

-Deadzero9