Great plugin. I'm in love with this thing!
There is a bug/error that I found with the plugin however, with WordPress Multisite. The plugin works with the main domain that MUltisite is installed on, but when activated it makes all of the other subdomains and external domain categories disappear. You're not able to view and create new categories on the children domains.
Specifically when Admin Sort is checked, no posts display in the front end in the child themes The parent theme's categories still show however.
Thanks again for an awesome plugin!