duplicate posts in database?

I have a question about using Push syndication. Does this plugin create duplicate posts in the database? Example: If I write a post on site 3 and want it to appear on sites 1 and 3, does it create two posts in the database or one?

Thanks.

http://premium.wpmudev.org/blog/how-to-publish-to-multiple-wordpress-sites-from-a-single-install/