Everything seems fine with the mapping. The odd thing is that some attributes get added to the groups fine while others go missing.
Do you know which log file would possibly tell me something? I've checked the data domain's .out and .reqlog but they don't tell me anything has gone wrong and since the graph ran successfully, nothing is displayed in the Integrator logs.
That's awfully weird but glad it's working.
If you check the reqlog for the two requests (the XML cuts off after some number of characters, maybe 8000 or so) and check the differences, it might be interesting to see how the message is being sent in the two cases.
This feels like a bug to me though I'd wait for someone on the Product side to chime in as to if it's a Web Service issue.