The default layout displays feedback on the errors detected by the grammar checker below your submitted text. This was a pedagogical choice. The idea is that learners must try to remember the feedback long enough to scroll up to the text area and make to the correction. Some users have requested that their text and the feedback be displayed side-by-side, so we gave users a choice. You can see feedback displayed under your text or to the right of the text. Click the arrow button under the text area on the right-hand side.
How to switch layouts