I'm trying to make a superflat world, but the preset code does a strange, hard-to-describe thing when I actually use the code. See images.

As you can see in the images, I enter the code, this code being for a research world for strongholds, and return to the preset menu. I return to the code menu and the preset has "scrambled" itself.

EDIT: With the commas in the parentheses replaced by spaces, the code doesn't screw itself up.