I thought about the stride thing yesterday with my KMs, and it's NOT the stride. I did measure that way back when I got a FitBit. I tried to verify it last night, but do you think I could find that in the app? Nope! 

The big issue is the translation from my FitBit records to the data on the Virtual Challenge site. It's sporadic, and I have no idea what's happening, but have a look and see what I mean. 


The data from the Virtual Challenge website for the last two days


For comparison, my FitBit ...

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