That sounds like a caching issue in your browser. If your browser cached the page with the content looking a certain way and it reloads, it might pull from the cache rather than get a fresh copy of the information from the server.
Looks like OneDrive is probably adding the style stuff that's breaking the site and making the column drop down. It adds a div with a style that pushes the right box down. I could probably figure out how to sanitize the text in the paragraph and get rid of the styles of the sake of display on that page, but like I said, at this point I probably won't. I'll fix it up in the new version of the site.