Multiple, Dynamic, Sidebars Problem – First Sidebar not working properly

it looks like your name attribute is missing the sprintf aspect. that line should read

'name' => sprintf(__('Sidebar %d'), $i ),

otherwise %d doesn’t reference $i at all. Also, it looks like you should be calling the sidebar id, not the name. The name is just for looks. For example, once the above is fixed, this coould work:

<?php dynamic_sidebar( 'sidebar-1' ); ?>