hi, i think you need a loop, something like this:
<?php if (have_posts()) : ?>
<?php $count = 0; ?>
<?php while (have_posts()) : the_post(); ?>
<?php $count++; ?>
<?php if ($count < 2) : ?>
<?php the_content() ?>
<?php else : ?>
<?php if ($count < 11) : ?>
<?php the_excerpt(); ?>
<?php endif; ?>
<?php endif; ?>
<?php endwhile; ?>
<?php endif; ?>
hope it helps.
