There are exceptions like if an article was voted up enough it is possible to post another link to it later on. I'm really learning this as I go as I caught an

There are exceptions like if an article was voted up enough it is possible to post another link to it later on. I'm really learning this as I go as I caught an article that was what I thought was a dupe, but it was allowed to be reposted. I was voted down for saying it was a dupe. I posted a link that someone else already submitted, and I didn't know it was submitted already and then when I went to post a few days later about a bug fix in ReactOS I got the "Whoa slow down you're submitting too fast!" message. So I must have done something wrong with a dupe link and lost submitting link privileges. I apologize for that. I searched for the link before submitting it and didn't see it. Then when I did submit it, it was already submitted by someone else. It is a part of Hacker News that I am struggling with understanding as well.