The plugin doesnt fit nicely into my page

Hey WPMU DEV,

I bought your theme for the Q and A portion for my site.

Once installed it sort of worked. Its out of alignment and doesnt fit well into the page.

my site is http://www.financehub.sg and you can see the Ask a Question floating in space at the top bar near the blue home button and banking comparison part.

Do let me know how I can fix this

p.s I'm not very computer literate.