I walk and play. My kinetic capsule doesn't accurately keep up with how far I walk. Walking a mile will give 1 kilometer on average.
I suspect that using Ingress power saving mode is the issue.
Not power saving not a mile not a bug
I don't use Power Saving Mode. This is my pace during the recent 2km event.
On the other hand, you get some extra distance from GPS drift and by keeping your scanner open when you drive your car/bike in the city or take public transport. In the end, it's more or less 1km counted for 1km walked, depending on your circumstances.