28 times? I only see it was submitted once, 3 hours ago (and the original article was apparently published only 4 hours ago)
[I also submitted it, FWIW]
Now, I only ever submitted a couple of stories myself, but as far as I recall they start at 1 point by default, and can only be upvoted, so this is the lowest possible value. I can also see other "[flagged]", "[dupe]" and "[dead]" stories from the past couple of hours in the "newest" feed. When I click on another account's story that was "[flagged]" and is "[dead]," I can still see it listed under that account's submissions.
For the record, I doubt any such story would be buried here intentionally. Perhaps there is some other automated mechanism to remove duplicates if the linked URL matches exactly.
It won't show up there if it was already submitted by someone else.