Perspective full overview

[fiveyearplan]

We like to use the full overview or shift K to view a 3d image of our building. We have been able to then use the mouse to pan the building on all sides. However something has happened, and we can't seem to figure out how to fix it. Now when you click with the mouse it seems like he building is spinning around he mouse, also now when you go into shift k the building first appears at a distance where before it was close up. Any suggestions?