Sorry for not being more clear on that. You are correct in your presumption, after I made that change I tried it and it wasn't working. After I made the second post I had to run some errands and when I got back home I went into the Admin Panel and purged the cache. That did it, now it is centered.
Thanks guys for the help, it is much appreciated.
While I was playing around trying to get it to work, I decided to see what Subsilver-2 would look like. I looked at the preview and I think it looks pretty cool, so I decided to make it the default style for a little while to see how well the members like it. So I activated it and made it the default style, but for some reason when I go to the forum it hasn't changed to the new default style, it stayed at the old Prosilver style.
So I refreshed the browser and cleared the browser history, then I went into the Admin panel and purged the cache again. Unfortunately, that didn't do any good. I assume I am doing something wrong, or I am not doing something I should be doing, or maybe it is a full moon and I am going crazy. But in any case, for my own piece of mind, I would like to get this figured out. I don't have to change the way the site looks, I just want to know why it isn't working just in case I want to make a change someday, and because when something doesn't work it bugs me.