Yeah, I had been looking at this today and discovered the same thing, also from the xara standpoint, it looks as though you should design your footer, then hid it basically and design the page as if it is not there, cause the code put the footer basically below the page, so I think for the most part I just need to plan my designs out just a bit different when using the xt-cms system.
I am going to play around a bit and see if I can tweak this a bit more to get a more consistant result, but thanks for all your help and love the work you have done on this.