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Speed Sensor 2: Duplicate Activity Records in Garmin Connect
If you have paired a Garmin Speed Sensor 2 to both the Garmin Connect app and a Garmin device, it is possible for a recorded activity to be duplicated if the device you are using is an older model. Newer Garmin devices prevent this from occurring. If you are experiencing this issue and own any of the following devices, Garmin recommends removing the Speed Sensor 2 from the Garmin Connect app which will prevent this from occurring.
Affected Devices
Fenix 2 Series
Fenix 3 Series
Edge 1000
Edge 25
Edge 500
Edge 510
Edge 520
Edge 800
Edge 810
Edge Explore 1000
epix
Forerunner 310XT
Forerunner 620
Forerunner 735XT
Forerunner 910XT
Forerunner 920XT
vivoactive HR
vivosmart