Just purchased the 2.1 and before I updated the firmware to 1.28, I was running 1.27. I was playing around with the settings and calibration to get familiar. To say the least I was impressed and found that calibration was easy and accurate. That said, after updating the firmware to 1.28, I reset the settings and decided to get thing rolling for real. Went to calibrate at the fasted setting, it's starting point was 12 ml/min. I ran the calibration on the fastest setting and the end result was 39 ml/min. I changed the deviation and tested a dose of 20ml. The result was 21ml. So, I calibrated again. Same thing. 21ml. So I entered 10ml and it dosed 11ml. Calibrating the 3rd time, I wrote 40ml/min instead of 39ml. Ran a dose of 20ml and again it came out to 21ml. Am I doing something wrong?