Not unless you missed:
I deleted that (highlighted) using developer tools and the menu on the demo page went across the entire section where it was located. The only thing bounding it at that point was its parent element (click the image to see):
margin: 5px 0;
width: 170px; /*width of menu*/
border: 1px solid #9A9A9A;
So, if you tried that and it didn't work, then perhaps the parent element on your page is narrow.
If you want more help, please include a link to the page on your site that contains the problematic code so we can check it out.