When I first looked at reddit 7 years ago or so, I noticed that the front page would be different every time I refreshed it. Even if I sat there refreshing it all the time, there would be posts I never saw. There are often posts that have similar stories, there are a lot of stories out there. I don't think you want to limit any web aggregation site to one post about any story. Even if it were possible. The front page is snapzu is like that now.

We are all in different timezones so we all see the site differently.

Also voting is capricious. If you could make people vote for your story then it wouldn't be voting, it would be influence.

As well as that, snapzu is not as dependent on voting as say reddit. You get points just for contributing, just for snapping, just for commenting.

You can always add your snap as a link to mine as spacefish just did. I welcome the addition. I welcome being part of the conversation. I liked your snap and upvoted it.

I should also add that the comment section on your post is much more related to the post.