i am having similar issues also. I think it's a Garmin issue as the charts show on my free version of training peaks. Just completed a training session this morning and my data loaded direct to my garmin app on my IOS device and the cadence chart was showing there however after it uploaded to Garmin Connect from my IOS the chart cadence information disappeared from my IOS app and is not showing in Garmin connect. I have a edge 510.
