You likely calibrated with a pink noise that didn't represent the end frequency limits of the measurement sweep. That's why the double check "Check Levels" button is available on the measurement panel. The "Check Levels" button on the measurement panel uses the end limits as its cut frequencies rather than the conventional pink noise.I did the calibration to 75db first but when I did a sweep the volume was so loud well about the 75db set during calibration.
brucek