When loading up a world it shows two of the worlds

When I join a world in the 1.4.0 update it shows two images of the same world generation. This bug should be fix in the 1.2.3.60 update but it did not for me for some reason. I try restating my computer it not work, I try to a troubleshooting on it on my computer it did not work and I try to uninstalling it and re downloading and it did not work.