Distance not reporting accurately
Yesterday according to Google maps, I walked 11.9 miles, so 19.1 km. Looking at the route drawn by Google maps, this is accurate. During the entire DAY yesterday, Ingress logged 16 km, although in reality I probably walked an additional 1-2 km. All this with the game open, actively playing. While walking on curved paths, loops and up and down dead ends I did all the things such as recharging, dropping keys.
Pictured below is my route, and below that are the distances and times recorded by Google maps. Notice that I wasn't even walking very fast.