I'm missing a critique, what are unapproved critiques?
You might see a certain number of critiques listed next to your story and fewer actual critiques when you click on the story.
This is because a member's first critique has to be approved by the Moderators/Administrators before it becomes available. This process does not judge the quality of the crit as such but is meant to weed out padding, inflammatory and rude crits.
The reason the actual number shows up on the Queue page is that other members have to be able to see the real number of crits a given story has received so that they can direct their efforts to stories which have actually received fewer crits than others.
If you experience this just wait a bit and the crit will usually become visible within 24 hours.