I tryed how you advice me..

It works changing the sort priority.

<xsl:template match="/">
<xsl:for-each
select="/CommandList/CheckRouting/RouterList/Router/GroupList/Group/OutwardL
ist/Outward" >
<xsl:sort select="count(//Outward[Id=current()/Id]/SegmentList/Segment)"
data-type="number" order="ascending" />
<xsl:sort select="Price/Amount" data-type="number" order="ascending" />

.....

Thanks a lot.