Thanks for the feedback!

We've actually just implemented Undo! It didn't make it into the demo video but if you click on the little upside triangle next to a variation's title (e.g. "Variation #1") you have an option to Undo or Redo. There are keyboard shortcuts as well!

As for the front page, is it possible you accidentally hit tab and then enter? If you hit enter right away, it works. If you hit tab, it changes focus to the first testimonial link on the page which is that TC article. We'll fix this so it doesn't happen in the future.

Thanks again for the feedback!