Quiero pasar de esto:

A 3 columnas, pero me pasa esto...

El CSS de esa parte es:
Código HTML:
/* Post */
#post {
width:500px;
margin:0 auto;
padding:5px 0;
}
#post ul {
padding: 0px; margin: 0px; width: 486px; border: 1px coral dashed;
}
#post li {
background: url(images/dot.gif) no-repeat left top;
background-repeat: no-repeat;
background-position: 0 .65em;
padding: 1px 0px 1px 12px;
list-style-type: none;
border: 1px black dashed;
width: 162px;
}
.postcontent {
padding:5px;
border: 1px solid #a0abb4;
margin-bottom:10px;
}
Código HTML:
<div id="post"> <div class="title"><a href="europe/" rel="bookmark" title="Link to Europe">Europe (55)</a> </div> <div class="postcontent"> <div id="divListado"> <ul class="col"> <li><a href="europe/austria/">Austria</a> (12)</li> <li><a href="europe/estonia/">Estonia</a> (2)</li> <li><a href="europe/finland/">Finland</a> (3)</li> <li><a href="europe/france/">France</a> (8)</li> <li><a href="europe/germany/">Germany</a> (2)</li> <li><a href="europe/hungary/">Hungary</a> (6)</li> <li><a href="europe/italy/">Italy</a> (5)</li> <li><a href="europe/liechtenstein/">Liechtenstein</a> (1)</li> <li><a href="europe/netherlands/">Netherlands</a> (3)</li> <li><a href="europe/norway/">Norway</a> (2)</li> <li><a href="europe/poland/">Poland</a> (2)</li> <li><a href="europe/spain/">Spain</a> (2)</li> <li><a href="europe/united-kingdom/">United Kingdom</a> (7)</li> </ul> </div> <!-- Cierro divListado --> </div> <!-- Cierro post-content --> </div> <!-- Cierro post --> <div id="post"> <div class="title"><a href="oceania/" rel="bookmark" title="Link to Oceania">Oceania (13)</a> </div> <div class="postcontent"> <div id="divListado"> <ul class="col"> <li><a href="oceania/australia/">Australia</a> (10)</li> <li><a href="oceania/new-zealand/">New Zealand</a> (3)</li> </ul> </div> <!-- Cierro divListado --> </div> <!-- Cierro post-content --> </div> <!-- Cierro post --> <div class="clear"></div>


