Xsl transforms correctly choosing children but not on ancestor in indesign?

I am experiencing a strange problem with xsl:

<xsl:template match="@*|node()"> 
 <xsl:copy> 
     <xsl:apply-templates select="@*|node()|*[not(self::table)]"/> 
 </xsl:copy> 
</xsl:template> 

<xsl:template match="@value"> 
 <xsl:attribute name="value"> 
     <xsl:value-of select="translate(.,'&#xd;','&#xa;')"/> 
 </xsl:attribute> 
</xsl:template> 

<xsl:template match="text">
    <xsl:copy>
        <xsl:attribute name="value">
            <xsl:apply-templates/>
        </xsl:attribute>
    </xsl:copy>
</xsl:template>


<xsl:template match="b">
    <xsl:text>[b]</xsl:text>
        <xsl:apply-templates/>
    <xsl:text>[/b]</xsl:text>
</xsl:template>


<xsl:template match="i">
    <xsl:text>[i]</xsl:text>
        <xsl:apply-templates/>
    <xsl:text>[/i]</xsl:text>
</xsl:template>
<xsl:template match="@href"/>

My Xml looks like this:

<medium>
     <sheets>
          <sheet>
               <site>
                    All Elements
               </site>
          </sheet>
     </sheets>
</medium>

A <text-area> tag will look like this:

<text-area>
     <text>
          this is the <b>normal</b> indesign content
     </text>
</text-area>.

After xsl:

<text-area>
     <text value="this is the [b]normal[/b] indesign content"/>
</text-area>

Now the Problem:

When I export it in indesign and choose sheets, sheet, site or any other element where <text-area> is a child, it exports it as:

<text-area>
     <text value="this is the [b]normal[/b] indesign content"/>
</text-area>

ONLY when I choose medium it will look like this:

<text-area>
     <text value="this is the normal indesign content">
          this is the <b>normal</b> indesign content
     </text>
</text-area>

Why is this happening? I have NO idea... Why is it working on every other element other than "medium"?

Thank you in advance!