This comic was intended to be Jo-Jo #30, but they had to make a last-minute title change to Jungle Jo. All J-J stories have the feature-name erased from the title pages, leaving only "Congo King". In the stories he's always called Jo-Jo.
'Jo-Jo' erased from title page because of comic's name change to Jungle Jo
Jo-Jo whited out in title because of comic's name change to Jungle Jo