What was strange is not the actual measurement of 27-Oct-14 rather than the control measurement (because C value was overflow and the initial current compared to those 200V sounds like it were tested at 500V). When you test 50V and the capacitance shows "overflow" on the top right screen during the measurement, you should not go to test 200V rather than repeat at 50V or even 40V (but not lower than that).