I would give a call to Garmin support....sounds like the "new" 705 is bad too.
I was riding with mine this weekend and ran into an odd issue...in 17 min I rode 4555.2 miles. I mean I know I'm fast but that's pushing it.
Ok I'm not even fast...but what the hell happened in those 17 min? And why the heck didn't Training Center or Garmin Connect correct the bad data on import? They had the course plots but they went with the bad milage brought in with the speed/cadence sensor? Dumb. Oh and my wife riding right with me did not see the same issue in her 500 data.
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