Mapsource track properties

 

I uploaded today’s track to Mapsource (v 6.13.6) from my nuvi 750. I started looking at the various data points when viewing the track properties and noticed that on one leg of my journey I had attained a speed of 141 mph. I thought to myself if only my 2008 Jeep could go that fast. Further analysis of the track properties revealed a few more bogus speed readings. Anyone else have this same issue when viewing track properties after they've been uploaded to Mapsource?

I've not yet talked to Garmin to see but I'd be interested if anyone other than me is getting this or if I really have a hopped up 4x4.

Cheers.