It seems I am unable to edit any of my templates or create new templates when selling. The information does not save, either in description or item specifics. I was able to speak to customer support at eBay who informed me this was a known problem and given the nature of the problem it would be treated as priority.
Given that it became a known problem over 16 hours ago (apparently), and still persists, I doubt whether it's a priority. Anybody else having similar problems?