Data duplicated in datatable - jsf-2

Question

I have a problem with a dataTable component using Tomahawk.
I want to make a datatable with subcolumns in some columns. Something like that:
This table only have 2 rows but its duplicated. Here is the code:
<t:dataTable id="tabla1" value="#{userControl.mc64cljobs_encolados}" var="clh">
<t:column id="col1" >
<f:facet name="header" >
<h:outputText styleClass="leftColumn" value="Options"/>
</f:facet>
<t:dataTable id="tabla2" value="#{userControl.mc64cljobs_encolados}" var="clh1">
<t:column id="col11">
<f:facet name="header" >
<h:outputText styleClass="leftColumn" value="Delete Work"/>
</f:facet>
<center>
<h:form>
<h:commandLink actionListener="#{userControl.eliminaTrabajo(clh1.codigo, 'multicore64clustalwtrabajos', userControl.user, userControl.password, clh1.fileSequences, '')}" value="Delete" />
</h:form>
</center>
</t:column>
<t:column id="col12">
<f:facet name="header" >
File Sequence Fasta
</f:facet>
<center>
<h:form>
<h:commandLink target="popupWindow" action="popupWindow" actionListener="#{userControl.setOpenFile(clh1.fileSequences)}" value="FILE 1" />
</h:form>
</center>
</t:column>
</t:dataTable>
</t:column>
<t:column id="col2" >
<f:facet name="header">
Pairwise alignment parameters
</f:facet>
<t:dataTable id="tabla3" value="#{userControl.mc64cljobs_encolados}" var="clh2" >
<t:column id="col21" >
<f:facet name="header" >
Gap Open Cost
</f:facet>
#{clh2.costeOpenGap}
</t:column>
<t:column id="col22">
<f:facet name="header">
Gap Extend Cost
</f:facet>
#{clh2.costeExtendGap}
</t:column>
<t:column id="col23">
<f:facet name="header" >
Cost Matrix
</f:facet>
#{clh2.scoringMatrix}
</t:column>
<t:column id="col24">
<f:facet name="header">
Cost Match/Replace
</f:facet>
#{clh2.costeMatchReplace}
</t:column>
</t:dataTable>
</t:column>
</h:dataTable>
What is my error in that code? What am I doing wrong?
Thank you so much!

Answer 1

Check this :
Why JSF calls getters multiple times
The getter can be called more than one times in jsf lifecycle