JSF Problem with events

Question

4 comboboxes need to be used in several JSF pages.
This cbo are stored in the jspf file :
<%@ taglib prefix="f" uri="http://java.sun.com/jsf/core" %>
<%@ taglib prefix="h" uri="http://java.sun.com/jsf/html" %>
<f:subview id="cboSearch">
    <p>
        <h:selectOneMenu id="cboSites" value="#{searchFormMB.siteChoisi}"
                          onchange="submit()" valueChangeListener="#{searchFormMB.eventCboSitesChanged}">
            <f:selectItems id="siteItem" value="#{searchFormMB.siteItems}"/>
        </h:selectOneMenu>
    </p>
    <p>
        <h:selectOneMenu id="cboPeriodes" value="#{searchFormMB.periodeChoisie}"
                         onchange="submit()" valueChangeListener="#{searchFormMB.eventCboPeriodesChanged}">
            <f:selectItems id="periodeItem" value="#{searchFormMB.periodeItems}"/>
        </h:selectOneMenu>
    </p>
    <p>
        <h:selectOneMenu id="cboPersonnels" value="#{searchFormMB.auteurChoisi}"
                         onchange="submit()" valueChangeListener="#{searchFormMB.eventCboPersonnelsChanged}">
            <f:selectItems id="personnelItem" value="#{searchFormMB.personnelItems}"/>
        </h:selectOneMenu>
    </p>
    <p>
        <h:selectOneMenu id="cboEssais" value="#{searchFormMB.essaiChoisi}" binding="#{searchFormMB.cboEssai}"
                         onchange="submit()" valueChangeListener="#{searchFormMB.eventCboEssaiChanged}">
            <f:selectItems id="essaiItem" value="#{searchFormMB.essaiItems}"/>
        </h:selectOneMenu>
    </p>
</f:subview>The problem is with the last cbo (id="cboEssais") since "#{searchFormMB.eventCboEssaiChanged}" is called for the active page and for all previous pages. That means it is called once for the first page visited, twice for the second page visited, three time for the third page visited, ...
Any idea about this problem ? Thanks

Answer 1

When i change page valueChangeListener fired at stage RENDER_RESPONSE 6 and when cbo is change valueChangeListener fired at stage PROCESS_VALIDATIONS 3.
In both cases the number of successive fires (call of valueChangeListener) is equal to the number of (re)visited pages since beginning of the session.