Most recent post being overlapped by others

Hey,

I am setting up my client’s wordpress blog and I am having some issues with the page. Currently, my most recent post is being overlapped by the other posts. Take a look here: https://suzannahgalland.com/blog/

As you can see, you cant select the most recent post, it is overlapped. Any help would be greatly appreciated. I can post my css, although it dosnt seem to be the problem.