Hi @asmecher,
I’m not sure how to flush the cache in my local xampp installation 
But I’ll see what I can do. In the meantime I realized I forgot to give you an important information: I created all articles with the quick submit plugin. I try it again the normal way and look if the behaviours is identical.
Edit: With the normal way I don’t have the problem, so I think it has something to do with the quick submit plugin. Could you try again with the plugin? Maybe then you can replicate the behaviour.
Edit #2: Another user has the same problem: Error: the article display is different from the others - #6 by UBWolf
Kind regards
Daniela