Recently I've seen strange behaviour with services from different applications being mapped to an application although the applications and services are totally independent. Further investigation of the waterfall instance for a user revealed that although there were just 2 XHR resources triggered for this XHR action. but 4 PurePaths are available for analysis. Two of them for the application itself (that is correct) and two of them pointing to another unrelated application.
I'm not sure what is happening here but I think the PurePaths pointing to another service have been triggered by a different browser window of the same user.
Maybe someone could reveal in detail how the PurePaths are assigned to waterfall resources?