While adding a copyright notice to the footer of my system I noticed that the “Edit CSS/HTML” theme editor did not ‘flush’ the edit buffer contents when moving from a field with data to an unused field.
As a result, when I clicked on Footer (which had been empty) my CSS contents were presented there as if they were existing content.
I sorted it out, but that seems like it could be a pretty simple fix which might avoid confusion in the future.
Hey, thanks for the extra info! As @awesomerobot mentioned, I seem to recall this being a bug that did get fixed. Can you see if the [Communiteq](https://www.communiteq.com) (formerly DiscourseHosting) guys can update your site? If they aren’t able to update you on-demand, can you report back once you do get updated?