I have just read this post about displaying only the questions with at least 4 close votes:
Now, only questions with at least 4 votes/flags are listed in the close review queue. If you're thinking, "that's crazy!" THEN YOU'RE RIGHT! This dramatically reduces the utility of the queue. But, we've had one or two complaints about the size of the backlog, so it's time we took care of it.
I wanted to see the changes, and yeah, there are only 11.6k posts. I started to review them and I opened one to see how many close votes it has. It had 3 close votes. I guessed I was a temp problem.
Trying to reproduce the problem I opened another one. Randomly I will take the second one that appeared in the queue and has 1 close vote.
And here the vote count:
Aren't they completely burned down? :-)
some will have a combination of flags and votes, others will have a combination of flags/votes and Do Not Close reviews
.