It looks like the margin left property will need to be adjusted on the container div. I agree with the previous post about the wrong layout being chosen for the desired result you are looking for. You should be working with one of the fixed layouts, I think it would give you the type of layout you are looking for.
I think that it would be a good idea to create a new Sculptor layout and make any css changes or adjustments that you need while in CSS Sculptor. This is exactly what Sculptor is designed to do, you might find it easier to adjust it this way rather than making manual adjustments after the fact.