Dear joerg,
You can re-set positions in the layout file.
Example: go to "templates\sj_joomla3\layouts\left-main-right.xml", finding:
<spotlight html5tag="section" order="5" id="yt_spotlight">
<positions>
<position class="span2d4" data-normal="span3" data-tablet="span3" data-stablet="span4" style="ytmod" type="modules">position-a</position>
<position class="span2d4" data-normal="span3" data-tablet="span3" data-stablet="span4" style="ytmod" type="modules">position-b</position>
<position class="span2d4" data-normal="span3" data-tablet="span3" data-stablet="span4" style="ytmod" type="modules">position-c</position>
<position class="span2d4" data-normal="span3" data-tablet="span3" data-stablet="span6" style="ytmod" type="modules">position-d</position>
<position class="span2d4" data-normal="hidden" data-tablet="hidden" data-stablet="span6" style="ytmod" type="modules">position-e</position>
</positions>
</spotlight>
=>
<spotlight html5tag="section" order="5" id="yt_spotlight">
<positions>
<position class="span6" style="ytmod" type="modules">position-a</position>
<position class="span6" style="ytmod" type="modules">position-b</position>
</positions>
</spotlight>
Thanks