Sortable Drag Drop Grid problem while sorting
Hi All
I am fairly new to using JQuery, I have a simple 3x3 grid of draggable items these items are organised into a sortable list and floated left to give me my grid. the drag and drop and sorting is working fine. The problem I have is while JQuery is doing this some of my drag "elements" fly out of my container making everything look messy. I have included a simplification of my code below, I hope someone can help resolve this issue. Thanks in advance 
- <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<!-- Jquery links -->
<script src="scripts/jquery-1.4.2.min.js" type="text/javascript"></script>
<script src="scripts/jquery-ui-1.8.1.custom.min.js" type="text/javascript"></script>
<script type="text/javascript">
$(function(){
$(".targetList").sortable({
placeholder : 'highlight'
});
$(".targetList").disableSelection();
$('.draggable').draggable({connectToSortable : ul.targetList});
$('.target').droppable();
});
</script>
<!-- CSS Styles -->
<style type="text/css">
/* layout */
* {
margin:0;
padding:0;
}
#container {
margin:0 auto;
width:600px;
height:300px;
border: solid red 1px;
}
/* look and feel */
.targetBorder {
border:dotted #ccc 1px;
}
.draggable{
width:200px;
height:100px;
}
.header {
color:#fff;
background-color:#000;
}
#container ul li {
list-style:none;
float:left;
}
.highlight {
width:200px;
height:100px;
border:dotted #ccc 1px;
}
</style>
</head>
<body>
<div id="container" >
<ul class="targetList">
<li>
<div class="draggable">
<div class="header">
<h2>Header 1</h2>
</div>
<div class="content">
<p>This is the content of the container</p>
</div>
</div>
</li>
<li>
<div class="draggable">
<div class="header">
<h2>Header 2</h2>
</div>
<div class="content">
<p>This is the content of the container</p>
</div>
</div>
</li>
<li>
<div class="draggable">
<div class="header">
<h2>Header 3</h2>
</div>
<div class="content">
<p>This is the content of the container</p>
</div>
</div>
</li>
<li>
<div class="draggable">
<div class="header">
<h2>Header 4</h2>
</div>
<div class="content">
<p>This is the content of the container</p>
</div>
</div>
</li>
<li>
<div class="draggable">
<div class="header">
<h2>Header 5</h2>
</div>
<div class="content">
<p>This is the content of the container</p>
</div>
</div>
</li>
<li>
<div class="draggable">
<div class="header">
<h2>Header 6</h2>
</div>
<div class="content">
<p>This is the content of the container</p>
</div>
</div>
</li>
<li>
<div class="draggable">
<div class="header">
<h2>Header 7</h2>
</div>
<div class="content">
<p>This is the content of the container</p>
</div>
</div>
</li>
<li>
<div class="draggable">
<div class="header">
<h2>Header 8</h2>
</div>
<div class="content">
<p>This is the content of the container</p>
</div>
</div>
</li>
<li>
<div class="draggable">
<div class="header">
<h2>Header 9</h2>
</div>
<div class="content">
<p>This is the content of the container</p>
</div>
</div>
</li>
</ul>
</div>
</body>