There is an order of delivery implication to consider when using queued components in an event situation. Because the queued components service records and plays back all calls within the lifetime of a single object in one message, all calls are replayed in the order in which they were made. However, if there is more than one session with more than one object, order cannot be guaranteed. If order is important, make sure that calls that need to be played back in order reside on the same object instance.