CSV Import form extends past bottom of page

Continuing work, from this thread, on my CSV import page and found that with many records the form extends past the bottom of the page and the fields and submit buttons can't be clicked. Is there a way to add a scroll bar or show the form with multiple columns?

Here is the updated example:
http://live.datatables.net/yixobehu/4/edit

Also noticed the the CSV import seems to work only once. The second time the file can be chosen but the selectEditor form doesn't appear. This is ok in my environment and haven't tried to debug. This can be seen in the example if someone wants to take the time to look. My concern is the form display

Kevin