I have 3 sets of data that are shown on one chart. The first set of data on the chart looks good. The second set, however, is adding on to the first set. So it is not the correct distance from the x-axis. And then the 3rd set is adding on to the 1st and 2nd. I want the three sets to be completely independent of each other, so they are the correct distance from the x-axis. How can I do this?

Thanks