Hello @Fire488, Let me give you a warm welcome to the Fitbit Community. I'm wondering if when you are referring when stopped merging the information is because only one tracker's data is displayed on your Fitbit Dashboard?
Make sure your tracker are syncing successfully to your account and keep in mind when you are using multi-trackers algorithms 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. For best results and the most accurate dashboard, switch your trackers and remember to sync each one before removing it.
Keep me posted how it goes, I'll be around.
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