CSS3 "Column-count" does not align top of columns (Wordpress, responsive) - html

Question

first of all, I found that Question here but the answer won't quite fit in my case, which is why I ask a question, that may seem similar but isn't. If that makes sense somehow :-D
I'm creating a childtheme to the "responsive"-Wordpresstheme from cyberchimps.
For that I needed text to shape in 3 columns, but also to be editable in the backend of the Site. I managed that with CCS:
.col-940{
clear: none;
-webkit-column-count: 3; /* Chrome, Safari, Opera */
-webkit-column-gap: 40px;
-moz-column-count: 3; /* Firefox */
-moz-column-gap: 40px;
column-count: 3;
column-gap: 40px;
}
p {
margin: 5px 0px 0px 0px;
}
That now generates the problem, that the first column starts 5px lower than the following ones. I can't figure out why.
As said above the answer in the other thread will not work, because I also have sub-sites that only use 2 columns, which is why I can't use a defined width.
Above/before the div the text is in there always is just another div.
(PHP)container the text is in:
<?php if( have_posts() ) : ?>
<?php while( have_posts() ) : the_post(); ?>
<?php responsive_entry_before(); ?>
<div id="post-<?php the_ID(); ?>" <?php post_class(); ?>>
<?php responsive_entry_top(); ?>
<div class="post-entry">
<?php the_content( __( 'Read more ›', 'responsive' ) ); ?>
<?php wp_link_pages( array( 'before' => '<div class="pagination">' . __( 'Pages:', 'responsive' ), 'after' => '</div>' ) ); ?>
</div>
<!-- end of .post-entry -->
<?php responsive_entry_bottom(); ?>
</div><!-- end of #post-<?php the_ID(); ?> -->
<?php
endwhile;
get_template_part( 'loop-nav' );
else :
get_template_part( 'loop-no-posts' );
endif;
?>
(HTML)container as produced by the PHP:
<div id="post-25" class="post-25 page type-page status-publish hentry">
<!--
<h1 class="entry-title post-title">Kontakt</h1>…
-->
<div class="post-entry">
<p>
Lorem ipsum dolor sit amet, consetetur sadipscing …
</p>
</div>
<!-- end of .post-entry -->
</div>
<!--end of #post-25 -->
Screens:
Shot of the Situation
Shot with marked problem

Answer 1

You have applied 5px margin-top and the only place that occurs at the top of a column is at the start of the first one. You need to remove this margin-top, perhaps with
.post-entry > p:first-child {
margin: 0;
}

Answer 2

For me, I needed each item in the column to have a fixed height. It also had problems with vertical alignement. I was able to fix the vertical alignment by having a line-height on the item be the desired height of the item and wrapping the content of the item inside a div.
ul {
column-count: 2;
}
ul > li {
line-height: 30px;
}
ul > li > div {
height: 30px;
line-height: 1.2;
}