Page 'Blog' Template Not Working

I have a static home page set up on my template (I use a genesis theme), and a ‘blog’ page that is set to the ‘blog’ template so that it shows my blogroll.

As of today, for no reason it seems, it is no longer working. It only shows the most current post, and doesn’t give any options to see more posts.

Does anyone know why this would have happened? Thanks in advance!