Best AnswerThere's no way to manually configure these settings so you'll have to live with (or ignore) Fitbits use of average data for weight and height in this regard. Whether there's a suggestion on the Feature Request board here that you'd be interesting in voting for as an alternative, I don't know.
Mike | London, UK
Blaze, Surge, Charge 2, Charge, Flex 2 - iPad Air 2, Nokia Lumia 925 (Deceased), iPhone 6
Take a look at the Fitbit help site for further assistance and information.
Best Answer