Why is it progressively the # of points or way or even track seem to 'disappear'? Say I upload 8000 POI and then tomorrow I see some of the place I mapped doesn't show up as traced with POI missing at the next uploading. WHY? Is it a bug in my gps?

It'd be very much appreciated if someone could message me the solution.

So we can't 3D-fy our traces in Google Map yet? Or is there a way?