I guess it's the screen resolution doing that. I mean, mine is 1440*900, when you zoom out to see how it would look in bigger screens, yes it overlaps. So there's not really much I can do to it :/ Sorry! You could try to manually move it to the right if you want, to get it to look how you need it to though. It's the margin left in module-section-two, look for "SIDEBAR" in the css.

I would need to code the subtitle in for you, so I can't do that now, sorry! ^^'' But, just wanted you to know that the top margin you need to change to move the title is under "header h1", look for that, decrease the margin and it should move up :3