I’m just combining css files from other templates but I can figure out why I’m getting a split in the pages. Please take a look here, might need to widen it up to see the problem.
It is hard to describe but when I re-size the browser I’m getting a very weird effect. Like two windows moving apart. Does anyone have any guidance I can follow to fix the problem?

overflow:hiddenis the main culprit. Remove it, and everything “magically” shows up again.