Why does the turntable spin past 360 degrees? Is this normal?

The system is designed to perform an additional 30 degree turn during the scan. This is done because one of the arms become occluded by the body during the scan. The additional 30 degree turn allows the scanner to receive more data on the occluded arm to give a better result. 

To reset the turntable do the following:

1. Click "tools"

2. Click "turntable"

Turntable menu screen

3. Press "Start"

4. Press "Stop" once facing forward