Vários loops na mesma página

Aqui está a resposta:

http://www.wprecipes.com/how-to-use-two-or-more-loops-without-duplicate-posts

Acho que talvez valha a pena vc tentar fazer o que ele indica no final do arquivo:

Alternatively, it is possible to transform the $ids array to a comma separated string and use in along with the exclude parameter of the query_post() function.

Senão, pode ser que os loops tenham menos posts do que deveriam, já que os repetidos serão “pulados”. O comentário do Shawn dá a dica:

There’s a better way with less overhead.
Do the first part like you have, but change the 2nd query object to be:

$query = query_posts(array(’showposts’=>5,’post__not_in’=>implode(’,',$ids));
or, if you need a brand new query so as not to mess with the current query scope
$query = new WP_Query(array(’showposts’=>5,’post__not_in’=>implode(’,',$ids));

That way you’ll exclude the posts you don’t want at the time of the query instead of pulling a huge overhead of data you don’t need.