Have you even thought of checking the code to see when it is printed?
if (abs(x_range) > 500 && abs(y_range) > 650) //LANDSCAPE
return;
sprintf(buf, "\n*** UNUSUAL CALIBRATION RANGES %d %d", x_range, y_range);
When the X range is over 500 and the Y range is over 650, you are fine.
Otherwise you get this message.
Your X range is 10, and the Y range is 12.
Did you touch in the same area instead of the four corners?