In v.0.2.10 it seems to happen mostly at the bottom half of the wishlist sorters and in the v.0.2.11 draft it's also in the library. As far as what I found out with a quick click through most of them, it doesn't seem to affect the actual sorting, just the highlighting.
My knee jerk reaction is that it's probably happening because of the way I'm hiding certain sorters.
In v.0.2.10 it seems to happen mostly at the bottom half of the wishlist sorters and in the v.0.2.11 draft it's also in the library. As far as what I found out with a quick click through most of them, it doesn't seem to affect the actual sorting, just the highlighting.