Search widget breaks when using multiple loops?

Somebody shoot me please… Since this is the first theme I developed I didn’t know that I needed a search.php for my form to work! Anyway I created search.php and inserted The Loop, after I did that I’ve copied that file inside my theme and my search form worked like a charm!!
Hope this will help somebody else 🙂
My search.php looks like this:

<?php
/**
* The template for displaying Search Results pages.
*
* 
* 
* 
*/
    get_header(); ?>
<div id="blog">
    <?php if(have_posts()) : ?><?php while(have_posts()) : the_post(); ?>
    <div class="post">
    <h3><a href="https://wordpress.stackexchange.com/questions/83006/<?php the_permalink(); ?>"><?php the_title(); ?></a></h3>
        <div class="entry"> 
            <?php the_post_thumbnail(); ?>
            <?php the_content(); ?>
            <p class="postmetadata">
            <?php _e('Filed under&#58;'); ?> <?php the_category(', ') ?> <?php _e('by'); ?> <?php  the_author(); ?><br />
            <?php comments_popup_link('No Comments &#187;', '1 Comment &#187;', '% Comments &#187;'); ?> <?php edit_post_link('Edit', ' &#124; ', ''); ?>
            </p>
        </div>
    </div>
    <?php endwhile; ?>
    <div class="navigation">
    <?php posts_nav_link(); ?>
    </div>
    <?php endif; ?>
    </div>