End inside the nether

the End has spawned inside the nether some how,
here is the world
Download:
http://www.mediafire.com/download/t9v8z06latf1kee/minecraft+DIM+glitch.rar

And if you go through the end portal thing in the nether you go to the end

Nether
X: 86
Y: 63
Z: 12

Seed:
92556691