multi column in home and category

i forgot to write that it works with default them(with the code in css)

is it normal that it might work with a theme and not with another?seems more css problem anyway, as there is one column, and the second empty

that theme ( https://www.ads-software.com/extend/themes/raindrops ) is using a html list for the output of the posts; with consecutive numbered css classes .loop-1, .loop-2, .loop-3 etc and only uses the post_class() for the article container within the li elements; therefore the css does not work.

I don’t see any easy workaround;
you will probably need to locate the loop for the posts and add some coding to the li tags to get the ‘two-column’ effect.

try posting in the theme’s support section https://www.ads-software.com/support/theme/raindrops

or,as the main reason fot which i choose that templete is because of the 2 side bar
might be easier to build 2 sidebar on a tewntywelve theme?

build 2 sidebar on a tewntywelve theme?

have a look at https://zeaks.org/tutorials/twenty-twelve-theme-three-column-layout/

i have inserted all that code, but i can only see one sidebar..it s enough code, so for now i have just copied and pasted

acutally what happen now is that i have no control on widget
as i place theminto a widget area, the widget stop swhowing options.i just see the name of th ewidget but can’t open it anymore to change

no ok..it’s only strange behaviour.nee to click on save before can access to options.but still can’t see right sidebar

this is my functions.php in child
when open it in editor(Microsoft expression web), it higlight the closing tag at the end, like if there is an error
i can’t see an error though

<?php

add_filter('post_class', 'postclass_postspage_columns_correction');
function postclass_postspage_columns_correction( $classes ) {
  global $wp_query;
  if ( is_home() || is_category() ) $classes[] = 'post-column-'.(($wp_query->current_post%2)?'right':'left');
return $classes;
}

function individual_category_postsperpage( $query ) {
    if ( is_admin() || ! $query->is_main_query() )
        return;

    if ( is_category() ) {
        $query->set( 'posts_per_page', 2 );
        return;
    }
}
add_action( 'pre_get_posts', 'individual_category_postsperpage', 1 );

  // Register extra sidebar
function mytheme_widgets_init() {
    register_sidebar( array(
        'name' => __( 'Extra Sidebar', 'tto' ),
        'id' => 'sidebar-4',
        'description' => __( 'The Left Sidebar. Displayed on all but full width and homepage template.', 'mytheme' ),
        'before_widget' => '<aside id="%1$s" class="widget %2$s">',
        'after_widget' => "</aside>",
        'before_title' => '<h3 class="widget-title">',
        'after_title' => '</h3>',
    ) );
}
add_action( 'widgets_init', 'mytheme_widgets_init' );

<?php if ( is_active_sidebar( 'sidebar-4' ) ) : ?>
    <div id="extra-sidebar" class="widget-area" role="complementary">
        <?php dynamic_sidebar( 'sidebar-4' ); ?>
    </div><!-- .extra-sidebar .widget-area -->
<?php endif; // end extra sidebar widget area ?>

// Override content width (for photo and video embeds)
$content_width = 500;

// Display 1000px width content if full width page template
function mytheme_content_width() {
    if ( is_page_template( 'page-templates/full-width.php' ) || is_attachment() ) {
        global $content_width;
        $content_width = 1000;
    }
}
add_action( 'template_redirect', 'mytheme_content_width', 11 );

// Change default thumbnail size
function mytheme_twentytwelve_setup() {
    set_post_thumbnail_size( 500, 9999 ); // (default featured images)Unlimited height, soft crop
}
add_action( 'after_setup_theme', 'mytheme_twentytwelve_setup', 11 );

// Add child theme body class
function mytheme_body_class( $classes ) {

     if( ! is_page_template() )
          $classes[] = 'custom-layout';

    return $classes;
}
add_filter( 'body_class', 'mytheme_body_class' );
?>