You actually have this CSS in your child theme which is hiding it:
.entry-title {
display: none;
}
As for moving it, you could try this:
add_action( 'after_setup_theme','tu_move_posted_on' );
function tu_move_posted_on()
{
remove_action( 'generate_after_entry_title', 'generate_post_meta' );
add_action( 'generate_before_entry_title', 'generate_post_meta' );
}