Nick Lappos, many thanks for your excellent post. Given your background and the company I believe you're employed by, the quality of your post is not too surprising.
I doubt that Nick would say what I'm about to say, but here's a quote from his post:
<font face="Verdana, Arial, Helvetica" size="2">It is surprising to many people to find that the Gamma angle is seldom exactly 90 degrees. If the designer guesses wrong before flight test, and is not too energetic after testing to make it right, you can have non-orthogonal control system that makes the pilot adjust for yet another helicopter control anomoly.</font>
I believe this is the situation with the Robbie.
I also believe that Nick's company goes to the trouble to remove as many control anomolies as possible, before delivery of its products to its customers. But then again, his company builds much more expensive helicopters.
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Safe flying to you...