Re: position and grouping?

I need to send this again, as I am no closer to understanding why this
is not working.  Name order is correct, until I have more than one
mods:mods element with the same mods:name content.  Example output is
now like:

Amin, A.  (1994) Post-Fordism: Models, Fantasies and Phantoms of
Transition, In A. Amin Ed., Post-Fordism: A Reader (Oxford:Blackwell
Publishers)   pp. 2345.

N. Brenner (1999) Globalisation as Reterritorialisation: The Re-scaling
of Urban Governance in the European Union, Globalisation as
ReterritorialisationUrban Studies, March , 36(3) pp. 43151.

N. Brenner (2000) The Urban Question as a Scale Question: Reflections
on Henri Lefebre, Urban Theory and the Politics of Scale, International
Journal of Urban and Regional Research,  24(2) pp. 36178.

position() _never_ relates to the location of a node in a source
tree. It always refers to a position in a current node list
(or sequence in 2.0). That is if you select a node with self:: it
always
has position() =1 even if it's the 1001 child of some parent.

But I don't see why the test I have correctly handles the first
mods:name in a mods:mods element, except if the same names are repeated
in another mods:mods element.

In other words, I want the when test to be satisfied for all
first-authors.  So what am I doing wrong?

<xsl:template match="mods:name" mode="full">
    ...
    <xsl:when test="$sort-order='first-author' and position() = 1 and
not(parent::mods:relatedItem)">
      <xsl:apply-templates select="mods:namePart[@type='family'] |
mods:namePart[not(@type)]"/>
      <xsl:text>, </xsl:text>
      <xsl:apply-templates select="mods:namePart[@type='given']"/>
    </xsl:when>
    ...
</xsl:template>

<mods>
  <name type="personal">
    <namePart type="given">Jane</namePart>
    <namePart type="family">Doe</namePart>
  </name>
  <name type="personal">
    <namePart type="given">Steve</namePart>
    <namePart type="family">Smith</namePart>
  </name>
<mods>