Trying to pull of a double Muenchian

I have found various suggestions on this list, and links to more
explanatory pages describing the Muenchian technique to sort or group
xml data.

However, I am trying to do a kind of a double Muenchian, which is to
group xml data i two levels. but there must be something i am missing,
because it is not working as I expected.

The xml is the kind of standard data format:
<data>
 <row>
   <item name="1">data 1</item>
   <item name="2">data 2</item>
   <item name="3">data 3</item>
  </row>
 <row>
   <item name="1">data 1</item>
   <item name="2">data 2</item>
   <item name="3">data 3</item>
  </row>
</data>

My real xslt look like this:
<?xml version="1.0" encoding="ISO-8859-1"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>
        <xsl:output method="xml" version="1.0" encoding="ISO-8859-1" 
indent="yes"/>
        <!-- V A R I A B L E S -->
        <xsl:key name="suplier" match="/csv_data_records/record" use="item[2]"/>
        <xsl:key name="product" match="/csv_data_records/record" use="item[4]"/>
        <xsl:template match="/">
                <book>
                        <xsl:apply-templates/>
                </book>
        </xsl:template>
        <xsl:template match="csv_data_records">
                <xsl:for-each select="record[count(. | key('suplier', 
item[2])[1])=1]">
                        <chapter>
                                <xsl:attribute name="name"><xsl:value-of 
select="item[3]"/></xsl:attribute>
                                <xsl:attribute name="value"><xsl:value-of 
select="item[2]"/></xsl:attribute>
                                <xsl:for-each select="key('suplier', item[2])">
                                        <product>
                                                <xsl:attribute 
name="group"><xsl:value-of
select="item[4]"/></xsl:attribute>
                                                <xsl:for-each 
select="key('product', item[4])">
                                                        <item>
                                                                <status>
                                                                        
<xsl:value-of select="item[1]"/>
                                                                </status>
                                                                <ean>
                                                                        
<xsl:value-of select="item[6]"/>
                                                                </ean>
                                                                <title>
                                                                        
<xsl:value-of select="item[7]"/>
                                                                </title>
                                                        </item>
                                                </xsl:for-each>
                                        </product>
                                </xsl:for-each>
                        </chapter>
                </xsl:for-each>
        </xsl:template>
</xsl:stylesheet>

It seems that I am not getting the second grouping on the items right.
They are grouped all right, but they are repeated x times the node
item[4].

What have I missed out, or what am I doing wrong here.

/Thomas

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