XSL transformation for non-nested XML

This is some XML data that I have -

<?xml version="1.0" encoding="UTF-8"?>
    <OrderDisplayRequest>
       <facXML>
          <faRecord>
             <recordCode>11</recordCode>
             <item>
                <itemMapCode>1</itemMapCode>
                <itemValue>1</itemValue>
             </item>
             <item>
                <itemMapCode>2</itemMapCode>
                <itemValue>1</itemValue>
             </item>         
             <item>
                <itemMapCode>5</itemMapCode>
                <itemValue>TEXT FOR WORKCODE 1 IN ITEMS LIST. Adding a lot of extra text. This is so horrendous. I hate this XML structure, this needs major tweaking so that we get XML that can be consumed properly. What is the</itemValue>
             </item>         
          </faRecord>
          <faRecord>
             <recordCode>11</recordCode>
             <item>
                <itemMapCode>1</itemMapCode>
                <itemValue>1</itemValue>
             </item>
             <item>
                <itemMapCode>2</itemMapCode>
                <itemValue>2</itemValue>
             </item>        
             <item>
                <itemMapCode>5</itemMapCode>
                <itemValue>maximum amount of text that you can add at the workcode level?</itemValue>
             </item>         
          </faRecord>
       </facXML>
    </OrderDisplayRequest>

There are two faRecord elements. The first two elements are the sequence number and subsequence number. This is the XSL I had before:

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://ift.tt/tCZ8VR" version="1.0">
   <xsl:template match="OrderDisplayRequest">
      <MCSResponse>
         <OrderDisplayResponse>
            <xsl:apply-templates select="facXML/faRecord[recordCode='11']" mode="OrderDisplayResponse" />
         </OrderDisplayResponse>
      </MCSResponse>
   </xsl:template>
   <xsl:template match="faRecord[recordCode='11']" mode="OrderDisplayResponse">
      <TextValueDetail>
         <xsl:apply-templates select="item" mode="TextValueDetail" />
      </TextValueDetail>
   </xsl:template>
   <!--Text value detail for order -->
   <xsl:template match="item[itemMapCode='1']" mode="TextValueDetail">
      <SequenceNumber>
         <xsl:value-of select="./itemValue" />
      </SequenceNumber>
   </xsl:template>
   <xsl:template match="item[itemMapCode='2']" mode="TextValueDetail">
      <SubsequenceNumber>
         <xsl:value-of select="./itemValue" />
      </SubsequenceNumber>
   </xsl:template>
   <xsl:template match="item[itemMapCode='5']" mode="TextValueDetail">
      <ItemisationText>
         <xsl:value-of select="./itemValue" />
      </ItemisationText>
   </xsl:template>
   <xsl:template match="*" mode="TextValueDetail" />
   <!--Ignore all other data-->
</xsl:stylesheet>

This will generate two TextValueDetail elements - a 'flat' structure when in fact the text in both elements belongs to the same Workcode. Is there any way using Keys or something else that I can generate an output that looks like this instead - with multiple ItemisationText elements inside a single TextValueDetail element, using the SequenceNumber and SubSequenceNumber fields. TIA! [I am trying SequenceNumber same and SubSequenceNumber greater than 1 as some sort of a key but I am struggling.]

<?xml version="1.0" encoding="UTF-8"?>
<MCSResponse>
   <OrderDisplayResponse>
      <TextValueDetail>
         <SequenceNumber>1</SequenceNumber>
         <SubsequenceNumber>1</SubsequenceNumber>
         <ItemisationText>TEXT FOR WORKCODE 1 IN ITEMS LIST. Adding a lot of extra text. This is so horrendous. I hate this XML structure, this needs major tweaking so that we get XML that can be consumed properly. What is the</ItemisationText>
         <ItemisationText>maximum amount of text that you can add at the workcode level?</ItemisationText>
      </TextValueDetail>      
   </OrderDisplayResponse>
</MCSResponse>