Arras Theme- Same image and heading for each post

FOr some inexplicable reason, all the post snapshots on the homepage of my website Restaurants Uncut are showing the same image and title although the summary of the post and post link are alright.

Has my website been hacked or is there some other plausible reason for it?

I recently installed the facebook comments plugin but then I deactivated to see if it was interfering with the functionality. Still nothing.

Please help!