Two categories

Why do we have a Category:All images with unknown copyright status‎ and a Category:Images with unknown copyright status‎? I see no difference in these two categories. The first has 17 files, the second 18 files. But why two of them?  Harry granger   Talk   contribs 22:37, December 14, 2012 (UTC)

My guess would be that we somehow ended up with two separate templates, one that sorts them into the former and the other into the latter. I'll investigate it in more detail later. ProfessorTofty (talk) 23:16, December 14, 2012 (UTC)