Why does the summary page acres agree with the acres on the Monitor but the once the yield map is printed, they aren't the same? For example, The monitor said 61.22 acres in this certain field, when i loaded tha data to the computer the sumary page says 61.22 but when i print the yield map, it says 59.59 acres? It does this on other farms as well. The field average yield is the same on both.