My 920XT is set to nordic skiing. When it is uploaded to the iOS app, the title of the activity says "Nordic Ski" but the activity shows up as "Cardio" so there is no total mileage or similar statistics displayed or even listed in the statistics. I can change the activity back to nordic skiing (typically specifying skate or classic) manually to see all the data, but why is it changing the activity at all? And, more importantly, how can I get it to default to nordic ski?