I have 2 problems with this navigation ...

For some reason it shows the children to the item called 'Service menu' (id=1097) even though that umbracoNaviHide is set to 1, and all my selects include not(umbracoNaviHide = 1)

The other problem, is that, I only want the navigation to expand along the way, showing subpages the pages I've clicked.

Any ideas ?

The XML looks like this.
The XSLT has been hijacked from here and modified a bit so it now looks like this.

<?xml version="1.0" encoding="utf-8" ?>
<xsl:stylesheet
        version="1.0"
        xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
        xmlns:umb="urn:umbraco.library"
        exclude-result-prefixes="umb"
>

        <xsl:output method="xml" indent="yes" omit-xml-declaration="yes" />

        <xsl:param name="currentPage" />
        <xsl:variable name="siteRoot" select="$currentPage/ancestor-or-self::Frontpage[@level = 1]" />

        <xsl:template match="/">
                <ul class="leftnavigation">
                    <!-- Start with children of the site root -->
                    <xsl:apply-templates select="$siteRoot/Subpage/Subpage[@isDoc and not(umbracoNaviHide = 1)]" />
                </ul>
        </xsl:template>

        <xsl:template match="Subpage[@isDoc]">
                <xsl:variable name="firstitem" select="'first '" />
                <xsl:variable name="lastitem" select="'last '" />
                <xsl:variable name="currentitem" select="'selected '" />

                <xsl:variable name="classes">
                    <xsl:if test="position() = 1">
                        <xsl:value-of select="$firstitem"/>
                    </xsl:if>
                    <xsl:if test="position() = last()">
                        <xsl:value-of select="$lastitem"/>
                    </xsl:if>
                    <xsl:if test="@id = $currentPage/@id">
                        <xsl:value-of select="$currentitem"/>
                    </xsl:if>
                </xsl:variable>
                <li>
                    <xsl:if test="normalize-space($classes)">
                        <xsl:attribute name="class">
                            <xsl:value-of select="normalize-space($classes)" />
                        </xsl:attribute>
                    </xsl:if>
                    <a href="{umb:NiceUrl(@id)}">
                        <xsl:if test="$currentPage/ancestor-or-self::Subpage[@id = current()/@id]">
                            <xsl:attribute name="class">aktiv</xsl:attribute>
                        </xsl:if>
                        <xsl:value-of select="@nodeName" />
                    </a>
                    <!-- Make sure there is at least one visible page below, otherwise we get an empty <ul/> -->
                    <!-- If you need to stop at some level, do that here, like this: -->
                    <!-- <xsl:if test="*[@isDoc][not(umbracoNaviHide = 1)][not(level &gt; 4)]"> -->
                    <xsl:if test="Subpage[@isDoc and not(umbracoNaviHide = 1)]">
                        <ul>
                            <xsl:apply-templates select="Subpage[@isDoc and not(umbracoNaviHide = 1)]" />
                        </ul>
                    </xsl:if>
                </li>
        </xsl:template>

        <!-- This automatically hides items with umbracoNaviHide checked -->
        <xsl:template match="Subpage[umbracoNaviHide = 1]" />

</xsl:stylesheet>