Any ideas why my pcb tracks are doubled up ?? and look strange.

And no there are not 2 tracks on top of each other. A pair of tracks going through the board, to make top and bottom layers. There are a number of paired tracks throughout. Is it just a normal thing and edit one of them out?

Also a funny track ?? creating a triangle, and another pair of tracks, with one track going to a through hole. Is it just a normal thing and edit it one of them out.