Mode “One Page” x Menu “Fixed”

Using the “One Page” mode menu, I noticed that the menu is not fixed and “scrolls” along with the page. OK. However, even with a reduced logo, I can not get the Menu to go to the Exact section on the page.

Would it be possible to keep the menu fixed, without scrolling the page in “One Page” mode?
Is it possible to correct this without having to reduce the size of the logo any longer?

The page I need help with: [log in to see the link]