I set my first row of tiles on a level batten measured the center of the room on a wall with a large range and metal splash back. I then tiled to the left and right of the splash back and down the sides. When I started the next day and stared tiling the second row I found the one of the tiles on the first row was not a full tile (9.9 cm instead of 10 cm). To remove all the tiles and start again was going to cause too much damage so I just cut the row 2 tile above the bad one to be the same length. You can hardly notice the "bad join" but I know it's there. Is there any way I can hide that bad "cut" join. I attach a drawing that may help explain what I mean. I know this is an absolute amateur mistake so any help would be appreciated.
