Drivesmart 55 split up gpx's

After a road trip and the Drivesmart powered from the car, I went to download the gpx and the gpx files was broken up into 21 different files. It should be a single file. I also had my old Nuvi running simultaneously and it correctly had a single gpx for the trip. Further, at one point in the trip I noticed it said it lost satellite. Turned off and on but did not come on until several minutes later and it was very hot.Im suspecting the Drivesmart has a thermal issue and kept dropping satellite and thats whey the broken up gpx.
Any experience with this?

I had contacted support and asked me to send the gpx file but no response after 1 week. I think I should return the unit and try another as this one may be defective. Maybe the 65 since its bigger has better thermal properties?