I made a nether portal in my original world. I got to the nethers and built my house 39 blocks high from the first portal. After i built my nethers house, i created a portal in there so i dont have to go down 39 blocks to get to the original world. After i made it and went through it, i found myself on a ice lake and a world of snow and sand(of course its other minerals but it was sand mountains very high). Explored it and its defiently not my world. Has this happened to anyone else??
I didn't quite understand...
So it's not surprising you popped out elsewhere. That's your world, just a vastly different part of it.