My scmdraft is messed up. I can't change the terrain isometrically. I have to close it and reopen it to make it work, but then it sometimes doesn't. What the fu** is wrong with it?

I THINK you just have to watch for Shift/Ctrl/Alt buttons... if they are blocked or something, that migh screw it up, but I'm not sure...

When you attempt to place Isometric terrain over terrain that was made using copy and paste, or with the square tool, it causes problems with Isometric placement, could that be the problem?

No. I'm placing isometrical terrain on top of isometrical terrain. And it just doesn't do anything.

Is it actually isometric, or does it just look that way? You can copy and paste isometric terrain and it will mess up, also, most compressions will turn all terrain into square terrain.

It actually is isometric terrain. I didn't compress it. It seems to be working fine now though.