Howling:Doctor's regenerations and Moffat's latest statements

So, I read this the other day. I've already brought it up here, but I want to see what you guys think. What does Moffat mean by "I think you should go back to your DVDs and count correctly this time. There’s something you’ve all missed"? Imamadmad (Contact me) 11:20, October 15, 2013 (UTC)