Problems with my registration bar

[barcena]

I guess that will be the name.

I'm having this trouble only whith guests, when as a guest you will see the site wider and the graphic all sort of screwd, please see the attachment.

I'm guessing this is happening because of the bar that makes you try to register length since only guest will have this problem.

When as a guest even the quotes will block an ad on the last post of everypage.

Any help on how to fix that?. I'm not coder, not a pro, but I have had vbulletin since forever and I know how to change things if you told me how to step by step or at least an idea on what is causing this.

Thank you so much