When you submit a link that has been previously submitted it upvotes the previous submission. It's most likely that a large number of HN users all tried to subm

When you submit a link that has been previously submitted it upvotes the previous submission. It's most likely that a large number of HN users all tried to submit the Techcrunch story at the same time, whereas the only way this submission gets upvotes is through people clicking, reading the story and then upvoting.