One day I was flying around in creative mode mapping a new world. After a bit I decided to head back because it was night time and it was depressing me. I turned around and flew for a while until I started wondering why it was taking so long to get back. I checked my map see if I missed my house in the dark and what I saw shocked me. I saw a circle in the middle where I started then after a lot of blankness there was a circle in the corner where I was. I headed in the in the direction of the circle it the middle. After MUCH longer than I went in the first place I saw my house.
Please tell me what you think the cause of this is.