Hi
Something is altered in Garmin Connect recently.
I'm using Vivoactive as my default activity tracker and this is setup properly in GC. But when I turn on my forerunner 735 the steps from it is synced to GC. And still only the Vivo is set up as tracker in GC.
This has not always been so, so it must be a bug.
Using the IOS version of Connect.
My wife has the same problem even though she uses a Vivofit as step counter.