It may help to check the settings from the Organizer menu (Media Tab):
View >> Show People in Tag Panel
Thanks. That helped a little bit, but not with the merging of the identical imported tags and People tags. They seems to be separate systems? Other tags you can merge by selecting both and right click < Merge Key word tags.
I can of course do it all manually now that I'm able to search for both tag types in Media, but this seems unnecessary and idiotic...