There are quite a number of CSS elements styling that needs to be changed in order to consistently change the width of the theme. You probably missed changing a few.
Use Firebug extension for Firefox to figure which are those and change them.
To change the top bar height, place this in Custom CSS option or in a child theme’s style.css file:
#top-bar {
height: 54px;
}
Note though the maximum height it can take is 65px. Any more than that it’ll show up the other element in the sprite image it’s using as background. If you absolutely need it to be more than that, just change the background as well so it won’t be using the sprite image.