Garmin Connect and 920xt.
In Garmin Connect, viewing an activity, as you move the cursor along the time line or distance line of the graph the indication of either time or distance is displayed on the graph near the cursor. Sometimes when I view activities and I set the graphs to "over distance" the elevation graph goes away, the distance (usually displayed on the cursor) continues to show time, and the black and white spot dies not move on the red track line in the map.
I use this functionality to calibrate the distance against trail sections of known length. I ski regular routes, and as my Garmin is woefully inaccurate this is a key band-aid to calculating my training distances, paces, etc. recorded accurately.
Please help!