This is sort of a meta-question, which was prompted when I saw the another submission of the same url that I submitted reach the front page of HN. Is the HN submission tool broken?<p>My example:
https://news.ycombinator.com/item?id=21918556
https://news.ycombinator.com/item?id=21913030<p>Example of similar posts:
https://news.ycombinator.com/item?id=21918610
https://news.ycombinator.com/item?id=21916651<p>I'm sure there are other examples out there.
There is, or at least was yesterday, a problem with 'Ask HN' submissions. Story (question) submission worked fine but users got an error message, so they kept submitting the same again.<p>The example you list seems new indeed. Usually there's at least a difference in URL. Or the older story is a day old (stories that didn't gain traction get another chance).<p>This is something for hn@ycombinator.com to check on.
Some other examples of this happening:<p><a href="https://news.ycombinator.com/item?id=21916831" rel="nofollow">https://news.ycombinator.com/item?id=21916831</a><p><a href="https://news.ycombinator.com/item?id=21920583" rel="nofollow">https://news.ycombinator.com/item?id=21920583</a>