So is this a bug that will be fixed? Or do I reinstall the original patch? Or reload? Or do I wait for an update?
It's not a bug. It's just that the developers added a config.set file to the update that overwrites the previous one.
The reasons for this could be many, for instance they might have changed something in it.
It's no biggie though.
Download the patch again and overwrite the config.set file.
Maybe keep a backup safe somewhere on your system. Next time you update reapply the patch
after you have updated.
Edit.
These (in red) definitions are not in the incest patch but are in the new config.set file from the update, the crossed out definitions are translated by the regular incest patch.
I will add them to the config.set file on my system and see if it changes anything. Maybe the short version of the names was what was added.
Edit.
After replaying the entire game again I can say that adding the definitions to the incest patch doesn't break anything.
But it doesn't add anything that I noticed at this point either.