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Value Change Listener events being broadcast to all listeners ???

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Hi , I have 5 <h:selectManyListbox> in a jsp , which are calling 5 different event handling methods in the Backing Bean . When I change the value in any of the Select components ( ONLY FOR THE FIRST TIME ) i find that all the 5 event handling methods are invoked , even those that are not associated with the component which fired the event .
Why is the event being broadcast to all event handlers ? Any workarounds or caveats to this issue ? Anyone faced this before ..

thanks in advance ...

It is sorta covered in the JavaRanch Style Guide.
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