Well I am seeing the same thing now, and not just one, but several duplicates.
I have not requested any manual syncs (I don’t even think I can).
I am seeing non run/walk activities in the queue, but this thread seems to explain it: post
I’ll try @davemorin’s delete activity method, mention above (never saw that option before, I would have started doing this sooner, as this is not the first time I have seen this, this was just the biggest).
They are clearing, but I hope it’s not eating up valuable API calls.