Reply To: Portfolio pages misbehaving

If anyone still having this problem please try to change this in functions.php:

function portfolio_posts_per_page( $query ) {

    if ( $query->query_vars['post_type'] == ‘portfolio’ ) $query->query_vars['posts_per_page'] = 6;

    return $query;

to this:

function portfolio_posts_per_page( $query ) {

    if ( $query->query_vars['post_type'] == ‘portfolio’ ) $query->query_vars['posts_per_page'] = -1;

    return $query;

It worked for me.