you didn't see this buried in another thread, there may be a bug in the Category Search.
I did a search with a - in front of 2nd POV just to select one category. Then I chose "with a score of 10 or more."
When I sorted by name, a list of stories appeared with no score.
When I sorted by score, it said no matches.
This is the issue with the scores on stories with less than 20 votes. The story has a score, but it doesn't display a score until there are 20 votes so the outlier removal is actually doing something.
When the results of the search aren't sorted by score, you see the stories that have scores but not enough votes for the score to display. When you sort the results by score, those results get filtered out by the sorting algorithm.