Track Map and Track Logs dont match

On 6/13 I had a IFR training flight from KPLR to KANB using N50TM. When reviewing the flight on flight aware, I noticed the flight track map initially showed more information than the track log had recorded. Now the track map intermittently alternates between a long version and short version. The track log has never shown all of the points on the longer track, but seems to consistent with the short version.

I realize this is an area of limited radar coverage. I am just wondering what causes the difference in the longer track map? If there is additional radar points, why dont they show up in the track log?

Thanks,

David

Just an FYI… I have saved both Track Map images if you need them for comparison purposes.