Sidebar widget presentation issue

Presentation of Widget contents no longer separated on individual lines, they are squashed on line as if there is no separator (as if wrapped). I have added some CSS inserts using <ul> and <li> formatting could this be the cause of the effect. I have tried changing the sidebar widths but the wrapping is not affected.

(Site on local hots so no link to provide)

CSS inserts are

#main {
float:left;
width:68%;
background:#ffffff;
}

h2 {
padding:12px 0 12px 20px;
background:#999999;
font:bold;
font-size:16px;
color:#FFFFFF;
}

#sidebar {
float:right;
width:28%;
background:#fffff;
}

ul {
float: left;
width: 100%;
margin: 0 auto;
padding: 0 auto;
list-style: none;
}

li {
float: left;
width: 48%;
margin: 0 auto;
padding: 0 auto;
}

HTML**************

<div id="wrap">
<div id="main">

<h2>SUperPlan - Automated model based scheduling</h2>

Imagine if your 3D model could be used to generate not only a costed BOM, EVA, a schedule and a 4D/5D simulation all at the press of a button!

Well the wait is now over; SUperPlan gives you all this and more..

Designed to leverage your investment in design; whether in producing construction simulations or maximising your ability to value engineer your project. SUperPlan is a productivity solution that gives you an instant view of project cost and time. SUperPlan provides you with a solution that supports your design decisions as they determine the cost and time required to deliver your project.
<ul>
<li><p><strong>Features include:</strong>

<p><strong>Classification</strong> - Automated geometry recognition.</p>

<p><strong>Analysis</strong> - Calculated quantities.</p>

<p><strong>Scheduling</strong> - Gravity and phase based rules.</p>

<p><strong>Review</strong> - Sequence play back.</p>

<p><strong>Costs</strong> - Output of costed BOM and EVA.</p>

<strong>Import/Import</strong> - Round trip sequence to scheduling applications where they can be edited and re-integrated.

SUperPlan is currently developed as a <a href="http://sketchup.google.com"><span style="font-family: verdana, arial, helvetica; font-size: xx-small;">Google Sketchup</span></a> plugin, Google Sketchup is widely used by designers and contractors to rapidly generate models for project concept and visualisation.

<strong>Future Development:</strong>

SUperPlan is being constantly evolved and we invite strong industry participation in discussing and defining our development roadmap.Future development will concentrate on calculation of sequence derived from the 3D model; tied to this will be tools to help users focus on time and cost options all of which will be delivered in a simple and intuitive environment thereby building on the value proposition that is SUperPlan.For our users we additionally offer bespoke enhancements to both tailor specific functions enhancements and assist in the integration with third party systems such as design estimation and scheduling applications.

<li><strong>Who is it for:</strong></p><strong>Designers</strong> You work with and for clients to create world class infrastructure solutions. You keenly understand and interpret constraints and constantly seek to achieve positive project outcomes. SUperPlan works for you supporting your need to rationalise the cost and time to deliver projects, such considerations are central and immediacy of such rationalisation places your efforts in a virtuous circle of continuous improvement and ultimately a competitive industry advantage.

<strong>Estimators</strong> You are a customer of design, you may already use electronic design for take offs much of which may already be classified helping to reduce low value add and repetitive activities. SUperPlan provides you with object recognition, quantity take off, a rates/classification table, BOM and an automated Cost schedule and estimate.

<strong>Schedulers</strong> You interpret design and estimation information on which you base and generate a delivery schedule for a project. The greater the quality of information you are provided the more accurate the schedule that is derived. Constraints involve design detail whether on the basis of correctness, completeness and interoperability (2D vs. 3D). Estimation information quality is also tied heavily to design. SUperPlan by deriving an estimate and schedule from design acts as a driver to the generation of quality design information. In providing automation in the derivation of your schedule SUperPlan's sequencing algorithm allows you to focus efforts on the exceptions rather than the rules allowing you the time to maximise the value your skills and expertise add.</li>

</ul>
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<div id="sidebar">
<h2>Philosophy</h2>
<strong>Plan to deliver - Deliver to plan</strong>

<strong>'Delivery Simulation'.. </strong>defined as the process of testing for resource constraints to verify the ability to deliver goods &amp; services reliably on time and to budget.

Optimisation in all areas of delivery is dependent on achieving a measurable understanding of the existing and possible solutions available. The foundation of this understanding is matting together the who, what, where, when of delivery which often is devolved to fragmented supply chains.

<strong>Delivery simulation Ltd </strong>is your partner in the realisation of these goals..

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<div id="sidebar">
<h2>Articles</h2>

<p><a href="company.shtml"><img src="http://127.0.0.1/images/book.ico" alt="" hspace="4" width="13" height="13" align="absMiddle" /> <strong>Drum Beats</strong> - Optimise throughput and flow in your project</a></p>


<p><a href="affiliate.shtml"><img src="http://127.0.0.1/images/book.ico" alt="" hspace="4" width="13" height="13" align="absMiddle" /> <strong>Space, the lowest common denominator? </strong>- The most commonly used yet the least well planned</a></p>


<p><a href="awards.shtml"><img src="http://127.0.0.1/images/book.ico" alt="" hspace="4" width="13" height="13" align="absMiddle" /> <strong>When is a simulation actually a visualisation?</strong> - What is the difference and what is its value? </a></p>


<p><a href="users.shtml"><img src="http://127.0.0.1/images/book.ico" alt="" hspace="4" width="13" height="13" align="absMiddle" /> <strong>'BIM'</strong> - The What, The Why, The How</a></p>


<p><a href="test"><img src="http://127.0.0.1/images/book.ico" alt="" hspace="4" width="13" height="13" align="absMiddle" /> <strong>How Low do you go?</strong> - When is granularity required, the decision making process and how you can manage it</a></p>
</div>
<div id="sidebar">
<h2>News</h2>
<strong>March, 2010</strong>

- SUperPlan V.1 is launched.

<strong>December, 2009</strong>

- Clash detection alpha released.

<strong>August, 2009</strong>

- First auto-sequence test success.

<strong>February, 2009</strong>

- Delivery Simulation Ltd launched.

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