I found out that there's a bug that prevents one to switch from the satellite map to the coloured road map. I started with the world map in the satellite mode, then I started to upload and nothing appeared on the grayish blue. When I wanted to change from satellite to the drawn road map, there was no possibility for clicking... just a little white hand, no pointer.
Now I started with the world map in the coloured road mode and the following uploading process showed again the road map + the green line with the green points, waiting to be reviewed.
So within the satellite mode there is a serious bug! I would rather do uploading with the satellite map.