When I create full width sections on my sites, big chunks are missing off of the right hand side


I am trying to create full-width sections on my site, but for some reason when doing so, big chunks are missing from the right side of my screen and then on the left side the section is overlapping the screen.

If you see in the image, the right side has a big white chunk there, and when I then put content center-aligned, it is not center-aligned and actually over the left by quite a bit.

If anyone could help with this that would be great.