Were there the code and pre tags like I had guessed from you screenshot. Can you post a screenshot showing what it looks like now and a screenshot of the edit page screen while in the visual editor. Do you have a page caching plugin or server caching? If you do, flush the cache. Also do a force refresh on your browser.
Or, better, yet… share a link to the page with me. My hands are pretty tied to what I can suggest by just looking at a picture … basically I’m guessing rather than giving your solutions.
Hope that helps!