GC & MFP step count

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Hi everyone. I have a new Vivoactive 3 Music that I bought mainly for music and running. I'm now on MFP and expanding my Vivo use to include steps. When GC auto feeds exercise data to MFP it will show steps and the run. I think the run is also included in the step count thereby overstating step activity by quite a bit. Is their a work around? Can I choose which exercises I want to auto sync to MFP.

Also, previously I used my Apple watch for step count. I find my Garmin step count to be significantly greater. I even bought an old school pedometer and compared the two and confirmed Garmin is about 3k greater which is a lot. Does anyone else question the step accuracy with Garmin?