I'm sorry about the issue you're having. When I tested it in your account I was not able to replicate. It's possible something is interfering with the site on your browser. I recommend following this FAQ to turn on Safe Mode/Incognito and then navigate the site as you normally would and see if the issue occurs.
I believe there is either a build up of cache or an extension that is interfering with the site. If the editor works normally in incognito, then go one by one and disable your extensions while viewing it in a regular browsing window.
I hope this helps. If you're still experiencing the issue then reach out to us at social_support(at)constantcontact(dot)com with a reference to this post and we will do additional troubleshooting to resolve it.
Nick S. Social Media & Content Manager
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