@yutaka1005, I think you have got wrong behavior of segmentation. Instead of the zip file can you try the folder tree and upload only one file ddd.txt to test whether segmentation is picking up correct host name or not?
Are you still having trouble with this issue? If so, please answer the commenter above so that they can help you further. Or, if you solved your query, would you mind describing the steps you took as an answer below so that others can learn from your solution?