Author comments with replies incorrectly styled

Recently I managed to get my new theme together on epicslant.com. I switched to the “threaded comments” via wordpress itself (IE no plug in) and special comment colors for authors.

It works for the most part until I looked one day and realized that the replies to author comments receive the same color as the author. I’m trying to ensure that doesn’t happen. For the most part I’ve done alright until I get to the .comment-author. No matter what I do either the author gets the default setting or the replying user gets the author setting.

Any thoughts? Example of issue: http://www.epicslant.com/2009/08/what-is-content/#comments

Here is my CSS

li.bypostauthor  .comment-author  {
	margin: 0;
	height: 40px;
	padding: 0px 0px 0px 0px;
	background: #6699FF url(images/bluefade2.jpg) repeat-x /* !important */;
	display: block;
	}

li.bypostauthor {
	background: #6699FF;
	}

.comment-author  {
	margin: 0;
	height: 40px;
	padding: 0px 0px 5px 0px;
	background: #ffffff url(images/silverfade.jpg) repeat-x;
	display: block;
	}

.comment img {
	padding: 0px;
	float: left;
	}

.fn {
	float: left;
	padding: 10px 5px 10px 10px;
	}

.fn a {
	color: black;
	font-weight: 800;
	text-decoration: none;
	}

.says {
	float: left;
	padding: 10px 10px 10px 0px;
	}

#respond textarea {
	width: 652px;
	}

.children {
	padding-left: 35px;
	background: #ffffff;
	}

ul.children .comment-author  {
	margin: 0;
	height: 40px;
	padding: 0px 0px 5px 0px;
	background: #ffffff url(images/silverfade.jpg) repeat-x;
	display: block;
	}	

.reply {
	padding: 0px 0px 15px 15px;
	}

Any help would be great