I'm afraid I have to defer the calibration question to others who may have a clue.. Except to ask, did you check the DIMU checkbox in the calib GUI? And to say, you may need to post your log(s) somewhere for others to test out (zip 'em so they're smaller). I do know that in the past, the quality of the dynamic data could definitely affect the calculations (but you probably knew that already).
-Max