How to reproduce :

• I create a template page with this zones :

  <template>
      <label i18n="true">SKIN_BO_ZONING_PAGE_LABEL</label> 
      <description i18n="true">SKIN_BO_ZONING_PAGE_DESCRIPTION</description> 
  
      <thumbnail> 
          <medium>thumbnail_32.png</medium> 
          <large>thumbnail_48.png</large>
      </thumbnail> 
      
      <zones>
      	<!-- HAUT DE PAGE -->
          <zone id="top-left" type="secondary" inherit=""> 
              <label i18n="true">SKIN_BO_ZONING_PAGE_TOPLEFT_LABEL</label> 
              <description i18n="true">SKIN_BO_ZONING_PAGE_TOPLEFT_DESCRIPTION</description>         
          </zone>
          
          <!-- COLONNE PRINCIPALE -->
          <zone id="default" type="primary"> 
              <label i18n="true">SKIN_BO_ZONING_PAGE_MAIN_LABEL</label> 
              <description i18n="true">SKIN_BO_ZONING_PAGE_MAIN_DESCRIPTION</description>         
          </zone>
          
          <!-- VOS UNIVERS -->
          <zone id="middle" type="secondary" inherit=""> 
              <label i18n="true">SKIN_BO_ZONING_PAGE_MIDDLE_LABEL</label> 
              <description i18n="true">SKIN_BO_ZONING_PAGE_MIDDLE_DESCRIPTION</description>         
          </zone>
          
          <!-- BAS DE PAGE -->
          <zone id="bottom-left" type="secondary" inherit=""> 
              <label i18n="true">SKIN_BO_ZONING_PAGE_BOTTOMLEFT_LABEL</label> 
              <description i18n="true">SKIN_BO_ZONING_PAGE_BOTTOMLEFT_DESCRIPTION</description>       
          </zone>
      </zones>
  </template>

• I configure it like this :

  <?xml version="1.0" encoding="UTF-8"?>
  <content-types>
      <zones>
      	<!-- COLONNE PRINCIPALE -->
      	<zone id="default" mode="exclude"></zone>
      	
      	<!-- HAUT DE PAGE -->
          <zone id="top-left" mode="include">
          	<content-type id="org.ametys.web.default.Content.article"/>
          </zone>
          
          <!-- VOS UNIVERS -->
          <zone id="middle" mode="include">
          	<content-type id="org.ametys.plugins.myfavorites.Content.myfavorites"/>
          </zone>
          
          <!-- BAS DE PAGE -->
          <zone id="bottom-left" mode="exclude"></zone>
      </zones>
  </content-types>

  > in the CMS all contents are allowed in the top-left zone whereas article content should be the unique content type that could be used