2. It looks like the buildings you shifted are now aligned with the underlying Bing Imagery, but that imagery was not aligned with the other buildings in the area. To fix this, it's usually best to align the imagery with the existing data first. To do that, go into the editor and press 'B'. Then select the imagery you like (Bing Maps Aerial is the default and okay for here, others may be more sharp/up to date). Scroll down to the bottom of that panel to "Imagery Offset". If you drag in that box, you can align the selected imagery to all the other buildings in the neighborhood, and then any tracing you do in the main box will be aligned. Hope this helps!