Unwanted Double Scroll Bars Showing up after download/upload

[Ooberstan]

I'm a beginner in web design.My friend wanted me to do a little work on his site, just changing some content.here is the site: http://www.newavenuesolutions.net/manage.htmlEvery time I download the file to work on it and then upload it, these strange non-functional double scroll bars would show up.Even when I tried just simply downloading the file, making ZERO changes, and then uploading it again, this same thing happened!