I've been pretty busy out walking and just generally with life, sorry for the delay on the response. I think this has been reported as a symptom of having too short a stride length set in your personal settings.
To answer your other query I'm pretty sure I have a friend or two who have successfully returned theirs and Family members who own extra so they don't have to do without if one has to be shipped back.
Lorraine Corso
I am not happy that this thing gives way too much credit for steps I know I did not do.
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