Yeah, I'm not sure if it was a policy change or just a mix up. In my case it was a Captain Marvel Adventures #1 with a missing back cover. It was graded last month as a Green .5 (no back cover), but I have another different copy of the very same book (also missing a back cover) which is a Blue .5 (no back cover) graded maybe a year ago. So it's either a change or inconsistency, but given the fact that there are many GA books with missing back covers in Blue .5 holders, I'd personally prefer that they stuck with putting those books in blue holders, since that's the way it has been in the past.