A tip. Try to reduce the yAxis (MAP or Airmass) to just outside the extremes of your vehicle.
For example, in an NA setup, you might see 0-100 MAP. Right now, the default is 0-200. Change the yAxis to 0-105 and tune your tables that way. Do not worry about the MAP #'s you'll never reach (as long as you stay NA...).
In an NA setup, if you use a yAxis of 0-200, the coefficient generator will try to line up the 100-200 MAP range values as well, which will reduce the accuracy of the 0-100 range, which is the range you care about.
Remember, when you go from Calculated Torque -> Coefficients, the code is trying to come up with curves to calculate new coefficients that represent the torque #'s as accurately as possible. This is not a 1:1 solution. The point is, how you use the tool will greatly determine how accurate the calculated coefficients will be for your given application.