Terminal split pane and stack icon size questions...

Terminal Split Pane:

Why does split pane it merely duplicate what I type in the second pane? Why can I only type within the second pane? Is there a way to change the orientation of the split panes?

I'm either missing something or this feature is totally useless/broken.



Stack Icon Sizes:

In the dock, when I view a folder stack in Grid, how do I change the icon size? They're like, goofy huge too me.