Editing One Blog Post Edits All Others

I have encountered the strangest bug on a new site I am creating. When I create two blog posts and edit the second one, it changes the first post as well so that they are both identical. If I go back to the first post and change it back to it's original post it changes the second one to match it. I tried deleting the blog posts and starting over but it is still happening. 

Is there anything I can do to fix this? You can see my posts at https://www.realmodelstories.com/stories

The titles and text are able to be different, but as soon as I add a youtube video and image gallery it changes the youtube video and image gallery on the other blog post to match the new one, and visa versa when I go back and re-edit the old one. So weird.

I finally decided to close my browser and start fresh and now it seems to be working. No idea what was going on there but closing your browser and reopening seems to be the only fix.