I am assuming that you have a custom tpl_header.php in your template
If not make a copy for it
You can try removing one or both of the clears I have highlighted
Code:
<div id="headerWrapper">
<!--bof-branding display-->
<div id="logoWrapper">
<div id="logo"><a href="http://poolcuesexpress.com/"><img src="includes/templates/Cue-Express/images/logo.gif" alt="Powered by Zen Cart :: The Art of E-Commerce [home link]" title=" Powered by Zen Cart :: The Art of E-Commerce [home link] " width="200" height="100" /></a></div>
<div id="taglineWrapper">
<div id="tagline"><h1>Pool Cues Express</h1></div>
</div>
</div>
<br class="clearBoth" />
<!--eof-branding display-->
<!--bof-navigation display-->
<div id="navMainWrapper">
<div id="navMain">
<ul class="back">
<li><a href="http://poolcuesexpress.com/">Home</a></li>
<li><a href="https://poolcuesexpress.com/index.php?main_page=login">Log In</a></li>
</ul>
</div>
<div id="navMainSearch"><form name="quick_find_header" action="http://poolcuesexpress.com/index.php?main_page=advanced_search_result" method="get"><input type="hidden" name="main_page" value="advanced_search_result" /><input type="hidden" name="search_in_description" value="1" /><input type="text" name="keyword" size="6" maxlength="30" style="width: 100px" value="Enter search keywords here" onfocus="if (this.value == 'Enter search keywords here') this.value = '';" onblur="if (this.value == '') this.value = 'Enter search keywords here';" /> <button class="cssButton button_search" onmouseover="this.className='cssButtonHover button_search button_searchHover'" onmouseout="this.className='cssButton button_search'" type="submit" value="Search">Search</button></form></div>
<br class="clearBoth" />
</div>
<!--eof-navigation display-->
<!--eof-header logo and navigation display-->
<!--bof-optional categories tabs navigation display-->
<!--eof-optional categories tabs navigation display-->
<!--bof-header ezpage links-->
<!--eof-header ezpage links-->
</div>