So if I understand you correctly you are having trouble achieving your desired styling through CSS on a template that you have purchased from template monster or one of their agents (if you're using the bootleg of this template that is floating around, then maybe you shouldn't be surprised that you're having problems - but hopefully that's not the case).
Having problems styling with CSS is not unusual. Often it's simply a case of making a change that seems like it should work, but not noticing that there is CSS elsewhere that is more specific than your change and therefore overriding it.
You have deleted your stylesheet, and as a result Zen Cart is defaulting to the template_default stylesheet instead. Here's where it gets a bit more interesting, because the template_default stylseheet has been heavily altered. Although the header shows it to be based that released as part of 1.2.6, it contains blocks such as this> .centerboxheading, .singleboxheading {
background-color: #C32B2B;
height:22px;
width: 362px;
background-repeat: no-repeat;
font-size: 11px;
color: #000000;
font-weight: bold;
border-bottom:0px solid #FFFFFF;
border-top:3px solid #FFFFFF;
border-left:5px solid #FFFFFF;
border-right:5px solid #FFFFFF;
padding-left: 15px;
}
which simply don't exist in the Zen Cart version. However, that explains the background color to your center column headings.
I suspect that the reason that you are struggling to get the stylesheet to work for you is because you have made some of your edits in the wrong place. I recommend first putting the stylesheet supplied with the template back into includes/template/tm008/css and if that doesn't produce the design that you were sold, then as Kim says, you should contact your vendor.
If that works however, put your adapted version in there instead and edit only that. If you are still having problems making it do what you want, come back here and say what specifrically isn't working and I'll see if I can help.
Kuroi Web Design and Development | Twitter
(Questions answered in the forum only - so that any forum member can benefit - not by personal message)