Xara :: Xdp7 Adds Load Of White Space To Image

I've spent most of today doing some print design in xdp7, I like the software a lot especially the live effects, however there seems to be a problem I'm experiencing using them in that once I have used an effect, xdp7 adds a load of white space to my image, like thousands of pixels, obviously I customised the size of the image before I began, and when I export the image it reads some of the time as the desired size, and some of the time the much larger size. I've tried cropping but it doesn't make any difference, I've tried changing the image size in the utilities option, but still the image I created is there along with the white space.

So how do I make sure what I save is just what I am creating, and how do I stop this from happening or counteract it. Also why does it do this?