Does it solve your problem if you replace the "com" template with the following (it solves the problem you pointed out anyway...)? It assumes that the number of number-elements is the same in each group of elements.

/Marcus

<xsl:template match="com">
  <table>
    <xsl:call-template name="verticalTable">
      <xsl:with-param name="rowIndex" select="1"/>
      <xsl:with-param name="endIndex" select="count(*/*)"/>
    </xsl:call-template>
  </table>
</xsl:template>

 XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list