Thanks for testing, great that it works on Windows 8 
Yes, the second editor is currently very small and thus hard to click (you can use Ctrl+Right when the main editor is in focus to jump to it though)
yes, that's normal ( but probably a bit couter intuitive if you're used to the usual plugins), since the editor on the right is 'static' .. don't get too used to this though, because I'm planning to get rid of the second editor and make writing definitions more similar to the other editor plugins
it was really just the fastest way to get something kind of similar