Like I said, what happened with Neversong was clear. Someone else used a similar nickname and put the game in the list of those to be included. At this time there was an itch.io page available - so it was in fact to puchase on itch.io. But I wasn't wondering what happened with this game since the publisher himself explained the error. I was more wondering about the other games I mentioned and at least in teh case of Johann Weiss I was able to talk with the dev and he did not understand why it has been removed as well.