Easy Social Share Buttons for WordPress register two additional columns in the blog post list. Those columns display information for the share value and share setup. If you are using a small screen size (resolution) this may lead to a broken screen.
How to fix the broken post list
If your post list looks similar to the above here is how you can fix it. Go to the Advanced -> Integrations menu and activate the options “Remove shares column from posts list” and “Remove the setup share options column from the post list“.