This way it would be correct.
The voltmeter is relatively correct. No perfect but it's OK. Mine is same.
If it is a Bluemotion it can even be a normal behavior and even more if the battery is new.
Make observations of the measurements over a prolonged period, especially when you notice that there is a slight increase in the brightness of the exterior lights.
If it is not a Bluemotion I guess the problem will be in the voltmeter, it should indicate the voltage differences between 14, ... and 12, ... volts permanently due to loads and regulation from alternator.
Some voltmeters have a screw on their back to adjust the accuracy in the measurement with the help of a reliable multimeter.