Nick,
From looking at your site, it looks like you need the content in the rotator to take up the full width of the pane it is in, whereas right now the content is only taking up half of the pane's width. Is this what you're wanting?
The default styling of the rotator provides half of the rotator's space for a thumbnail. Since you aren't using a thumbnail, you will need to make a small adjustment to the CSS styling used in the module. To make this change, open up the Site Settings page under the Admin menu. The last section in the Site Settings module is the Stylesheet Editor. In here, you will add a CSS style that overrides the style provided in the default Rotator styling. It looks like this:
.rotatorDescription {
width: 100%;
}
Let me know if that fixes your issue.