For some reason, my sidebar in the Wordpress theme I created shows up at the bottom of my page, not the top. Does anyone know what could be going wrong? Here's the index code:
<div id="holdall">
<?php
get_header();
?>

<!-- <div id="main"> -->

<div id="content">
<?php if (have_posts()) : while (have_posts()) : the_post(); ?>

<?php the_date('','<h2>','</h2>'); ?>

<div class="post" id="post-<?php the_ID(); ?>">

<h3 class="storytitle">
<a href="<?php the_permalink() ?>" rel="bookmark"><?php the_title(); ?></a></h3>

<div class="meta">
<?php _e("Filed under:"); ?> <?php the_category(',') ?> —
<?php the_author() ?> @ <?php the_time() ?> <?php edit_post_link(__('Edit This')); ?>
</div>

<div class="storycontent">

<?php the_content(__('(more...)')); ?>
<!-- <div border="1px dashed"></div>
</div> -->
</div>

<div class="feedback">

<?php wp_link_pages(); ?>

<?php comments_popup_link(__('Comments (0)'), __('Comments (1)'), __('Comments (%)')); ?>

</div>


<?php comments_template(); // Get wp-comments.php template ?>
<br><hr align="center" style="dashed"><br>
<?php endwhile; else: ?>

<p>
<?php _e('Sorry, no posts matched your criteria.'); ?>
</p>

<?php endif; ?>

<?php posts_nav_link(' — ', __('« Previous Page'), __('Next Page »')); ?>



<?php get_footer(); ?>

</div> <!-- closing main div -->
<br>

</div>
<?php
get_sidebar();
?>

<!-- </div> -->

</div>

And the CSS goes something like:

body {
margin: 0px 0px 0px 0px;
padding: 0px 0px 0px 0px;
font-family: verdana, arial, helvetica, sans-serif;
color: #333;
background-color: #FFF;
}
a {
text-decoration: none;
font-weight: bold;
color: #333;
outline: none;
}
a:visited {
color: #333;
}
a:active {
color: #333;
}
a:hover {
color: #333;
text-decoration: underline;
}
.ahem {
display: none;
}
strong, b {
font-weight: bold;
}
p {
font-size: 12px;
line-height: 22px;
margin-top: 20px;
margin-bottom: 10px;
}


h1 {
font-size: 24px;
line-height: 44px;
font-weight: bold;
margin-top: 0;
margin-bottom: 0;
}
h2 {
font-size: 18px;
line-height: 40px;
font-weight: bold;
margin-top: 0;
margin-bottom: 0;
}
h3 {
font-size: 16px;
line-height: 22px;
font-weight: bold;
margin-top: 0;
margin-bottom: 0;
}
h4 {
font-size: 14px;
line-height: 26px;
font-weight: bold;
margin-top: 0;
margin-bottom: 0;
}
h5 {
font-size: 12px;
line-height: 22px;
font-weight: bold;
margin-top: 0;
margin-bottom: 0;
}
h6 {
font-size: 10px;
line-height: 18px;
font-weight: bold;
margin-top: 0;
margin-bottom: 0;
}
img {
border: 0;
}
.nowrap {
white-space: nowrap;
font-size: 10px;
font-weight: bold;
margin-top: 0;
margin-bottom: 0;
/* must be combined with nobr in html for ie5win */
}
.tiny {
font-size: 9px;
line-height: 16px;
margin-top: 15px;
margin-bottom: 5px;
}
#content {
float: left;
padding: 10px 2% 10px 2%;
border: 0px;
background: #FFF;
width: 75%; /* ie5win fudge begins */
voice-family: "\"}\"";
voice-family:inherit;
width: 71%;
}
html>body #content {
width: 71%; /* ie5win fudge ends */
}
#content2 {
float: left; /* Opera5.02 will show a space at right when there is no scroll bar */
padding: 10px 2% 10px 2%;
border-right: 2px dashed #000000;
background: #FFF;
width: 25%; /* ie5win fudge begins */
voice-family: "\"}\"";
voice-family:inherit;
width: 21%;
}
html>body #content2 {
width: 21%; /* ie5win fudge ends */
}
#header {
float: left;
width: 100%;
padding: 10px 2% 10px 2%;
/* border-bottom: 2px dotted #111111; */
voice-family: "\"}\"";
voice-family:inherit;
width: 98%;
}
#margin {
float: left;
width: 10%;
padding: 10px 0% 10px 0%;
/* border-bottom: 2px dotted #111111; */
voice-family: "\"}\"";
voice-family:inherit;
width: 10%;
}
html>body #margin {
width: 10%; /* ie5win fudge ends */
}
#footer {
float: left;
width: 100%;
padding: 10px 2% 10px 2%;
border-top: 1px dashed #000000;
voice-family: "\"}\"";
voice-family:inherit;
width: 98%;
text-align: center;
}

pre {
font-size: 12px;
line-height: 22px;
margin-top: 20px;
margin-bottom: 10px;
}
#holdall {
float: left;
width: 80%;
margin: 10px 10% 10px 10%;
voice-family: "\"}\"";
voice-family:inherit;
width: 78%;
}
hr {
height: 1px;
width: 100%;
}

The sidebar just inserts

sidebar

What could I be doing wrong?

no, the problem is in the width of your columns...one is 75% and the other is 25%...it won't work.
adjust the larger column down to 74 or 73%...play with that for a bit until they line up properly.