Heart Rate Tracking while on the Charger

Has anyone else noticed that the watch keeps tracking heart rate while on the charger ? Also, it tends to report a really high heart rate. I have the data from Moto Body synced to Google Fit so that I can look at the hourly graph and see what was reported. I rest around 50-60 BPM, but over night when it's on the charger it reports 70-100+.

Anyone know if there is a way to disable the heart rate tracking while the device in charging ?

Continuous heart rate monitoring?

Does this watch support continuous heart rate monitoring during exercise or throughout the day? I have seen conflicting information regarding this feature, some saying that it works in S-Health and Nike+ and others saying you have to manually check each time you want a reading.