Unique IDs?

Good morning!

in my xsl:

<xsl:key name="ids" match="tc/pc/*[@id]" use="concat(../../@id,@id)" />

<xsl:template match="pc">
	<xsl:apply-templates select="*[@id and generate-id(.)= generate-id(key('ids', concat(../../@id,@id)))]" />
</xsl:template>

<xsl:template match="tc/pc/*[@id]">
  <fo:block><xsl:value-of select="@name" /></fo:block>
</xsl:template>


my xml:

<tc id="123">
	<pc>
		<status id="1" name="Status 1"/>
		<status id="2" name="Status 2"/>
		<status id="1" name="Status 1"/>
	</pc>
	<pc>
		<status id="5" name="Status 5"/>
		<status id="1" name="Status 1"/>
	</pc>
	<pc>
		<status id="1" name="Status 1"/>
	</pc>
</tc>

The current output looks as followed:

"pc1"   Status 1
	Status 2

"pc2"	Status 5

"pc3" 	


The output should look as followed:

"pc1"   Status 1
	Status 2

"pc2"	Status 5
	Status 1

"pc3" 	Status 1

Status No. must not exist more than one in one "pc".

What's wrong with my Stylesheet?

Thanks

Best regards
Sven