doubleSelect template uses the name as the part of a javascript variable name, so when you use an ognl-style variable reference, the Group and Temp variables fail to work
----------------
See (from 2.2.2)
simple/doubleselect.ftl +38:
  var ${parameters.name}Group = new Array(${parameters.listSize} + ${startCount});
    for (i = 0; i < (${parameters.listSize} + ${startCount}); i++)
    ${parameters.name}Group[i] = new Array();
  .... +72
 var ${parameters.name}Temp = document.${parameters.formName}.${parameters.doubleName};
<#assign itemCount = startCount/>
<#assign redirectTo = 0/>

so if in your jsp you use:
<ww:doubleselect
   ...
  name="foo.bar.id"
   .../>

the generated javascript looks like

var foo.bar.idGroup = new Array(etc.)
  ....
 var foo.bar.idTemp = document.myForm.doubleName

------------------------


${parameters.name} should probably be ${parameters.id}