Adding a second sidebar to Twenty Eleven

Hi,

I have created a child theme of Twenty Eleven and I am having trouble positioning my second sidebar I added using this link.

The sidebar is always aligned at the bottom of the page.
Here is my css (leftsidebar is the original sidebar and right is the new one I added.)
How can I move the post content to the left so there is enough room for the sidebar on the right? Or can anyone tell me what I need to do to get the sidebar exactly at the same location as the first one except on the right. Here is a link to my site
If you scroll all the way to the bottom you should see the second sidebar.

Thanks in advance!

@import url(“../twentyeleven/style.css”);

#page {
max-width: 1300px;
}
.single #primary {
width: 80%;
float: left; !important
margin-left: -30%
padding-left: -20%
}
#leftsidebar, #right {
width: 140px;
margin-top: 6%;
}
#leftsidebar {
float: left;
margin-left: 4%;
}
#right {
float: left;
margin-left: 70%;
}