Showcase Theme Menu not stacking

Trying to add a custom menu to a Showcase site at http://www.tiffnotez.com

Currently, Showcase is creating submenus across the nav bar instead of showing the top level category and then when hovering showing the submenu category items. Since this theme is based upon Twenty-ten, I would think that the menu would act the same.

Should look like this:
Arenas
God
Country
Community
Culture

Not:
Arenas
God Country Community Culture

Any suggestions?

Thanks,
Greg