This suggestion will be implemented in the next release. 
This logic will be work in manual mode because of joss_54 comment also. We can't identify all products automatically that's why it's you to you what product to exchange  :-) 
That's why you can use new button to exchange accessories 
List of selected products is available for exchange.
See screenshot of new version - 
http://screencast.com/t/ELDIiloaM
About terms of implementation- this feature will be available in December 2013  :-)