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TimothyH - thank you for the valuable information. It is also good to see that it is not just me losing my mind over here in frustration trying to figure out what the heck is wrong with my rides. It doesn't happen all the time, but it is enough to make me notice, and this last one just set me off. Not that I go on Strava and brag about what my ride was, but I follow a lot of faster people. This was definitely one of my better rides, average speed wise at least. So when I uploaded it, the feelings were pretty good. Then I saw what Strava said. So I uploaded a picture of the screen of my Garmin and called BS on Strava.
Training Peaks looks interesting. May give that a run and see how it is on the free end. Gathering that it is quite a bit like Strava?