A couple of issues

First you have stylesheet_old.css on your server and all sheets/files that end with .css are parsed in order. Check what you have changed and rename these with any extention EXCEPT .css.

Whatever you are using as an editor is adding spurious characters and if you are also editing php files with it this can be an issue
Code:
/**
 * Main CSS Stylesheet
 *
I see that you have 3 colors but only 2 swatches and they are 150px wide. If you had 3 they would not fit and I suspect that you changed these to render at 150px in your admin and suggest you revert to the default image size for these as this alone will probably correct this.

For 2 images you can change this in your style sheet from 20% to 45% with the current image width and only 2 images.

Code:
.attribImg {
	width: 20%;
	margin: 0.3em 0em;
}