Re: Multiple WordPress loops (more than two) without duplicate posts

[TheDoc]

That is a tough one.

I would say for simplicity I wouldn’t worry about duplicates – many major newspaper websites have a latest news and then categories on the page that contain the same articles. I don’t think there is anything wrong with that.

I would use query_posts to target the categories for each of your loops and set the amount of posts to show.

Don’t forget to use wp_reset_query after each loop.