Removal problems-Please Help

I am new to the imagineer world and I find myself more and more fascinated with the potential of this software. I am a 3-D modeler at heart so this kind of stuff is greek to me but I find myself eager to learn more about Mokey and Monet, but I can find no help from tutorial and I have no peers that can help me with this so come asking for help. I am trying to remove images in Mokey and no matter how I aproach it I always get the same result…a moving bloch! The system will get rid of my object but it doesn’t blend or fix the pixels so I get this “Predator” kind of look instead of a clean plate. Any advise?