Post Tiles are stacking and not displaying in a row

Hi,
I’m unable to get my post tiles to display in a row. I currently have 2 posts and they are stacked on top of each other. I do not know what I may have done to cause this glitch, could someone please help me! I’d greatly appreciate it.
Thanks in advance 🙂

http://www.luxenoirbliss.com

https://wordpress.org/plugins/post-tiles/