"ignore" Xpath only select first element

[thezead]

In the following message part :

<agreed xmlns="http://www.fixm.aero/flight/3.0">
      <route initialFlightRules="IFR">
         <expandedRoute>
            <routePoint estimatedTime="2016-09-22T17:18:48+02:00">
               <point fix="BEKOS"/>
               <estimatedLevel ref="FLIGHT_LEVEL" uom="FEET">2.15E2</estimatedLevel>
               <leg legId="0"/>
            </routePoint>
            <routePoint estimatedTime="2016-09-22T17:22:46+02:00">
               <point fix="BUBLI""/>
               <estimatedLevel ref="FLIGHT_LEVEL" uom="FEET">2.55E2</estimatedLevel>
               <leg legId="0"/>
            </routePoint>
         </expandedRoute>
      </route>
</agreed>

The objective is to validate the message thanks to the payload by ignoring the estimatedLevel nodes.
then put the following action:
receive("topic1")
.payload(awaitedMessage)
.ignore("//estimatedLevel");

problem:
only the first instance of the estimatedLevel is ignored.