Synced and lost steps

[sweetrunner]

After doing my 10k steps I turned on my Bluetooth and when it synced I lost over 1k of them. This has happened multiple times now. It's extremely frustrating.

[MarreFitbit]

Hey you @sweetrunner, welcome to the Fitbit Community ! By any chance, are you wearing two trackers?

If so, to ensure that the Fitbit dashboard continues to serve its purpose--providing a holistic and actionable view into your daily activity and goal progress--we designed the multitracker feature for customers who want to wear different trackers at different times of day or night. With multitracker you can count on a dashboard that accurately and seamlessly tallies your day's steps from Flex, your evening run and cool-down walk from Surge, and your sleep record from the tracker you find most comfortable at night. Our research and testing found that potential customers were interested in wearing trackers simultaneously only if doing so provided more features than a single tracker, which is not the case with Fitbit trackers. No combination of trackers is more helpful or accurate than a single tracker. 

So while there's no benefit to wearing trackers at the same time, we wanted to make sure that if a customer forgot to take a tracker off before putting on another we could still present the most accurate information possible on the dashboard. We do that by running algorithms that reconcile the overlapping data according to certain criteria. For example if one of your trackers has GPS data and the other one does not, we'll choose the GPS data when calculating your total distance since GPS is a better indicator of distance than step-counting alone.

All Fitbit trackers are highly accurate when worn correctly, so prioritizing the data of one tracker over another is usually arbitrary. For that reason we're unable to answer more specific questions about how overlapping data is reconciled. For best results and the most accurate dashboard, switch your trackers and remember to sync each one before removing it. If you haven’t already done so, please review our article at http://fitbit.link/ncbvz to learn about getting the most from your multitracker account.
Lastly, if you're a person who enjoys comparing the data from two or more different trackers, we recommend creating a unique account for each tracker. Fitbit accounts are always free and you'll be able to compare dashboards.

Visit our help site at https://help.fitbit.com/ for a host of accuracy articles (one per product) that address subtle differences in trackers and what you can do to ensure accuracy. 

Hope you have a great day !