The 'Content' tab was always the last tab, until the Smart Content tab came-up. Years of muscle training made me always go to the last tab to bring-up my content, and sure enough, I was clicking, by mistake, on the Smart Content tab to bring-up an empty content page.

It was so irritating that I wanted to start a petition to ask Daz to give the option to hide the Smart content tab for those users who don't use it, so the Content tab becomes the last tab, as it always was.