Elbows Music Blog Community

Hi,
I have this problem where my top ad above my header is displayed below the border I created for it. This also happens to an ad placed in between the first and second posts. I don't know if this is a problem with my CSS since this has happens before with my posts, but I was able to fix that. If anybody can help I'd be grateful, my blog is displayed strangely in all different browsers. This is my blog http://jpsblog.net.