So I developed an Artisteer template and I am trying to change my magazineJoomla layout a little so It resembles the theme of my template. So I went into the template CSS editor and changed this:

/* comment boxes */
#comment #Comments ul {
list-style-type: none;
list-style-position: outside;
list-style-image: none;
margin: 0px;
padding: 0px;
background: url(http://jbsecure.com/images/Journals/J-128-0010_paper_sample_500.jpg);
border-top: 1px solid #000000;

I wanted the entire background changed of my comment boxes but for some reason this CSS chnge is only occuring on every OTHER box. Not all of them. So I have the CSS change on one comment box and then my next comment box is plain white. How can I make it so that every comment box reflects the CSS background change?