No, this is definitely a Ralph's version issue - the hybriddict is my addition. It contains all the subspecies keys and descriptions. I haven't seen this issue with the slave guild though.
Is this a fresh install, patched, or just happened in the middle of your playthrough? How certain are you that you've installed the tweaks per the instructions? Could you try installing the tweaks and then the tweaks patch and tell me if the problem persists?