try to add queue component to the form or view. (check in guide a4j:queue)
I've added a queue to the form, but it doesn't work...
<h:form> <a4j:queue name="mstQueue" requestDelay="1000"/>
remove the name from the queueu. In this case it will become the default queue for the form components. The queue from your snippet should be referenced explicitly from the ajax components but built-in table ajax features do not provides common ajax optimization attributes including eventsQueue. So you could use named queue only creating external filtering sorting from your own controls..
it seems to work!