This answer came in Low Quality Posts review which was reviewed as "This is commentary on another post, not an answer" by this user*. But the comment was added 5 times automatically on behalf of that user.
First four comments' time is
2013-07-15 10:23:18Z while the last one's time is
2013-07-15 10:23:19Z. Those comments are still exist. 10K+ users can see that.
Is this a bug or something else?
* Because the comment is added on behalf of that user.