[Solved] Customizing Embedded Theme

So I've searched the forums, Google'd a million things, and tried all kinds of custom code to try and fix the issue I am having, but I have not had any luck. I am using Concrete5 for my CMS, and I have embedded Vanilla (using the default embed friendly theme that comes with Vanilla version 2.0.18.8) into a Dynamic iFrame -- everything has been going well except for a couple of pesky issues.

After enough hacking and searching I've been able to change most of the colors to what I am looking for to make the forums mesh with the rest of the site. My only problem is that I haven't been able to get some of the posts listed to change their background and mesh with the other posts. As well as a couple other small things (what appears to be borders or something under each of the categories, I'll post links to the site so it can be seen what I am talking about).

I've tried to break everything down with Firebug and find where the issue is, but I've been unable to do so. The problem seems to persist in the DataList Discussions class, but only for certain posts. I generally do not like to ask for help, but at this point I am running out of options. I've searched custom.css and have been unable to fix the issue. Adding the background to Content allowed me to change the background on the posts that have actually changed their background to what I was going for, the others have not. I've tried adding, removing, editing pieces in custom.css but just cannot seem to find the attribute I need.

If anyone has run in to this issue and solved it, please let me know.
My site is: http://www.saecula.com/forums/ -- this should take you to the forums where it is not actually embedded, and is just showing the embedded theme, the problem persists even there, so I know it isn't an issue with the iFrame.
And http://forums.saecula.com/ -- to see the embedded version, but it basically looks exactly the same, just condensed.

On those pages you'll clearly see the posts that do not mesh, as well as the borders/lines underneath the posts that do mesh, and underneath the categories to the right. Essentially, the entire background area should be the gray background.

Thanks,
Andrew