Sort by rated doesn't seem to work as I would imagine it.
I assumed if I sorted by rating it would put the highest rating at the top and lowest at the bottom. Instead it seems to put the items that has the highest rating total at the top (or at least that's what it looks like it's doing). i.e. An items that has received a 1 start rating 100 times will be higher than a five start rated items because it sees 100 vs. 5 instead of 1 vs. 5.
You can see this in action at my site
http://archive.furcartzone.com