The first notification was “broadcast” to all the techs that the Recommend procedure returned.  (In our case, that was all of one person, but it could have been a list!) But until that person clicked the Submit button in the PumpRepairRequest client, he wasn’t Assigned as the tech for the Collaboration.  Hence, we couldn’t get Collaboration context yet.  Once we could assign the tech, the next Client associated with the new Notify pattern could get the whole Collaboration.

I hope this is clearing things up!