I submitted the same post https://news.ycombinator.com/item?id=10689371 https://news.ycombinator.com/item?id=10689371 11 hours ago. But 4 hours ago, dang moved

I submitted the same post https://news.ycombinator.com/item?id=10689371 https://news.ycombinator.com/item?id=10689371 11 hours ago. But 4 hours ago, dang moved my comment to this post which was created 3 hours ago. It's very weird.