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)