This client came to us after having tried to add content and images to an existing site. The results had made a jumble of the page look and flow. We got into the backend and fixed everything...the code, the layout, the updates. The client was thrilled with the results. We even made the pages that weren't cohesive match the site design.
Some clients prefer to make their own site changes. We certainly understand this and we do everything we can to set them up for success in this category. In addition to offering the addition of a straightforward Content Management System to prevent clients from screwing up thier site, we also can mark up the site source files in order to make the change process more clear to our clients.