Resolution:
Durable Subscribers for Topics  is designed such that all messages published by the publishers are received by all subscribers of the topic and hence its recieved by all the inference engines which act as a subscribers .
If  the message has to be processed only once, change the JMS message model from topics to queues  and this can be done using a  EMS bridge .
You can also find detailed information on the EMS bridges under   TIBCO Enterprise Message Service User’s Guide-Chapter 3 Destinations- Destination Bridges .