I recently acquired a Vivofit which I paired successfully and have been using for the past week. I also own a 910xt which has been connected to GC for some time. As a results of linking the vivofit, whenever I log on to GC, I now get the modern view. If I change my Training zones on GC modern and want to send the updates to the 910xt I have to switch to the classic view because the modern view does not show the 910xt as an option, only displays the vivofit.
