CSS bootstrap alignment issue - pull right not working - css

Question

I am using simple css alignment of button on right hand side using pull right at http://www.inboundio.com/services, it is working for first block but it is not for second block. I am not sure what is going wrong, any help ?
You can see the code at the above url, I am also pasting it here too as per SO guidelines
<div class="span12 well">
<ul class="nav nav-list">
<li>
<h3 style="color:#495B67">Heading</h3>
</li>
<li><br>
<p>Sample Text</p><br>
</li>
</ul>
<div class="span8 pull-left">
<strong><b>Your personal consultation will include:</b></strong>
<p style="font-size: 17.5px">
</p><ol>
<li>How your current marketing strategy compares with your competitors</li>
</ol>
<p></p>
</div>
<div class="span4 pull-right">
<button class="btn btn-warning" type="button"><b>Contact Us</b></button>
</div>

Answer 1

because for first block you have set the css value :
.row-fluid [class*="span"]:first-child{margin-left: 0px;}
that only work for first child
do it like .row-fluid .well [class*="span"]{margin-left: 0px;}

Answer 2

There are some structure issues.
Replace the HTML part with the below code.
Explanations:
In previous box you have only two spans, but on second box, you have three spans without a wrap. So I added a wrap div with row-fluid class.
<div class="span12 well">
<div class="row-fluid">
<ul class="nav nav-list">
<li>
<h3 style="color:#495B67">Inbound Marketing Consulting and Analysis</h3>
</li>
<li>
<br>
<p>Request a personalized marketing assessment and receive a
one-on-one consultation that will provide you with quick tips and
valuable insights that will transform your current marketing strategy.
</p>
<br>
</li>
</ul>
</div>
<div class="row-fluid">
<div class="span8 pull-left">
<strong><b>Your personal consultation will include:</b></strong>
<p style="font-size: 17.5px">
</p>
<ol>
<li>How your current marketing strategy compares with your competitors</li>
<li>Full website analysis and opportunities to improve</li>
<li>SEO tips you can immediately implement into your website</li>
<li>How to generate more leads via your website</li>
<li>Blogging, email marketing, and social media strategy</li>
</ol>
<p></p>
</div>
<div class="span4 pull-right">
<button class="btn btn-warning" type="button"><b>Contact Us</b></button>
</div>
</div>
</div>