I also cannot do the calibration to my satisfaction. I use a Samsung Galaxy Note with ADW Launcher set to 6 columns and 5 rows. The 1x1 calibration widget works fine. After setting the 1x1, the 2x2 will not show the shade coming in from the right edge, even though I have hit the left arrow over 100 times. I followed the suggestion below, and set my ADW launcher to use a grid of 4 columns and 4 rows. Then I was able to calibrate both horizontal and vertical. I set to 5 columns and 4 rows, and couldn't get the shade to show up on the right hand side again.
Thanks,
Rob