fmachs

If you add /blog WordPress will try to figure out if it is a page or a post.
Numbers are good because each entry (post, page) in the database is associated with a number (an ID). The id is indexed, so the database search in a more efficient way. In text search, usually the first 3 letters are indexed to make things easy for search.

If I am wrong, someone will correct me.
Good luck.

Fábio

nvm.

Found line 520:
$search = " OR ({$search}) ";

And changed to:
$search = " OR ({$search}) AND $wpdb->posts.post_status = 'publish' OR $wpdb->posts.post_status = 'attachment' ";

That solved my problem. Now the search works for custom fields and isn’t duplicating entries.