is forms are working correct inside rich:table?
I have a table, and each row has form inside:

<h:column>
 <a4j:form id="assignToForm">
 <h:selectOneMenu id="selectAssign" value="#{controller.idToAssign}">
 <f:selectItem itemValue="" itemLabel="" />
 <f:selectItems value="#{controller.selectItems}" />
 </h:selectOneMenu>
 <a4j:commandButton id="buttonAssign"
 value="Assign"
 action="#{controller.assignItemToFacility}">
 <a4j:actionparam name="itemIdToAssign" value="#{record.id}" assignTo="#{controller.itemIdToAssign}"/>
 </a4j:commandButton>
 </a4j:form>
 </h:column>

Problem is - idToAssign passed correctly into backing bean only for last row in table. In other cases I've got null there :(

Does anybody else meet this issue? Are there any hints with placing forms inside table?