So I added a second calendar to my site and when I did it was already displaying information from the previous calendar I had on the site.  I don't know if this is a bug or not but I was able to fix it with an XSL if statement, here it is if it will help you (PDULliCalendar.xslt - line: 164ish)

          <xsl:if test="$currentPage/@id = umbraco.library:GetXmlNodeById(@id)/@parentID">
          <br/>
          <a href="{umbraco.library:NiceUrl(@id)}"><xsl:value-of select="umbraco.library:GetXmlNodeById(@id)/@nodeName"/></a>
          </xsl:if>