Removing certain "FAVORITES" stories

After reading Dorothy's Blog, I decided to go to My Account to see how I was doing (Yes, I am that vain. I'm weak, I know. Somebody spank me?). Anyway, I noticed a Favorites that really shouldn't be there, but I can't seem to remove it (I don't have permission?). I know what happened, sometimes when I hit "comment" I accidentally hit the Add to Favorites tag. I really do need better glasses! How can I clear out my favorites file so I can add the stories I really love? If I keep adding favorites, will the old ones be pushed out of sight?

Wren