Hi Angie,
Nick asked me to take a look at this. You are using nested unordered list, and your css style sheet doesn't have any support for that.
You would have to add a section to your style sheet so nested lists are defined. Or you could apply in-line styles in the html on the page itself. If this is only on one page, and not something you need site-wide, I would just use the inline styles on the page that needs it.
It's not a simple beginner mistake. It's actually fairly complicated. I'm not 100% sure how you write the code for that. I'll check and see if I can find a clear reference or someone else will know how to write it.
If you already know how to solve the problem with inline styles let me know.
Cheers,
Ed