[xsl] unparsed-text and nodes by position

If I've got data that looks like 

|Family|Tom|Mary|Bobby|Suzie|
|Family|Mark|Nancy|Alex|Mary|
|Family|Don|Patty|Brian|Jo

And I have a transform which looks like this

<xsl:stylesheet version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"; 
xmlns:xs="http://www.w3.org/2001/XMLSchema"; 
xmlns:fn="http://www.w3.org/2005/xpath-functions";>
        <xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/>
        <xsl:template match="/">
                <root>
                        <xsl:if 
test="unparsed-text-available('file://BNEWMAN/Users/bnewman/Desktop/test.txt')">
                                <xsl:variable name="datafile" 
select="unparsed-text('file://BNEWMAN/Users/bnewman/Desktop/test.txt')"/>
                                <xsl:for-each 
select="tokenize(normalize-space($datafile), '[|]Family')">
                                        <rootpart>
                                                <xsl:for-each 
select="tokenize(.,'[|]')">
                                                        <xsl:choose>
                                                                <xsl:when 
test=".[position()=1]">
                                                                        <father>
                                                                                
<xsl:value-of select="."/>
                                                                        
</father>
                                                                </xsl:when>
                                                                <xsl:when 
test=".[position()=2]">
                                                                        <mother>
                                                                                
<xsl:value-of select="."/>
                                                                        
</mother>
                                                                </xsl:when>
                                                                <xsl:when 
test=".[position()=3]">
                                                                        <child>
                                                                                
<xsl:value-of select="."/>
                                                                        </child>
                                                                </xsl:when>
                                                        </xsl:choose>
                                                </xsl:for-each>
                                        </rootpart>
                                </xsl:for-each>
                        </xsl:if>
                </root>
        </xsl:template>
</xsl:stylesheet>

I am expecting to get a result which looks like this
<root xmlns:fn="http://www.w3.org/2005/xpath-functions"; 
xmlns:xs="http://www.w3.org/2001/XMLSchema";>
        <rootpart/>
        <rootpart>
                <father>Tom</father>
                <mother>Mary</mother>
                <child>Bobby</child>
        </rootpart>
        <rootpart>
                <father>Mark</father>
                <mother>Nancy</mother>
                <child>Alex</child>
        </rootpart>
        <rootpart>
                <father>Don</father>
                <mother>Patty</mother>
                <child>Brian</child>
        </rootpart>
</root>

But I'm getting results which look like this 

<root xmlns:fn="http://www.w3.org/2005/xpath-functions"; 
xmlns:xs="http://www.w3.org/2001/XMLSchema";>
        <rootpart/>
        <rootpart>
                <firstnode>Tom</firstnode>
                <firstnode>Mary</firstnode>
                <firstnode>Bobby</firstnode>
                <firstnode>Suzie</firstnode>
                <firstnode> </firstnode>
        </rootpart>
        <rootpart>
                <firstnode>Mark</firstnode>
                <firstnode>Nancy</firstnode>
                <firstnode>Alex</firstnode>
                <firstnode>Mary</firstnode>
                <firstnode> </firstnode>
        </rootpart>
        <rootpart>
                <firstnode>Don</firstnode>
                <firstnode>Patty</firstnode>
                <firstnode>Brian</firstnode>
                <firstnode>Jo</firstnode>
        </rootpart>
</root>

Can someone help me understand why?

Btw, this is the Altova engine.
(I've been web surfing to figure out how to get Saxon 9 to integrate with 
XmlSpy on a Windows machine)

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