Minecraft: SuperFlat Problem?

I have just creating a TNT Canon. Then after that, I changed my render distance to FAR so I can see the explosion. I go to the explosion then suddenly, I saw a "Normal World" chunk. I don't know what is this but I think its a glitch. I also restart the game but it didn't work. Can someone help?

Thanks!
Minecraft: SuperFlat Problem

Added (1). Also, it makes a long long long Normal World chunks which it will surrounds all of the world.

Guest

Yes it probably is a glitch. Pretty cool since it hasn't happened to me. There should be a problem at all. IF anything you should be happy. ITS So COOL.

If that didn't answer your question then what is the actual problem?

Yankee