You are allowed to read only two stories until you have indicated which one is better. After that, you can read a third one, and indicate where it stands relative to the other two. After you’ve read two stories and indicated which one is better, you should see “Your Ticket” down at the bottom, and you can use that to re-order the stories you’ve read, or choose one that you haven’t read by clicking the >> widget. Note that the >> widget next to each story can also move it to a different place “Your Ticket.”
Sorry I was kind of rushed when I wrote this, so please ask for more clarification if needed, and it’s always possible that I made a bug, so if what I described is inaccurate, point that out too.
Thanks!