Quote - I should be using the dolly camera instead of the main camera if I want precise distances, either that, or use the main camera and subtract the distance that it is off by.

With your subject in the center of the scene, you will probably find it much easier to set the angles of the camera with the Main, or Aux, rather than the Dolly camera.

Quote - medzinator, I wasn't going to change the focal setting, simply because I don't know enough yet about how it affects everything else.

Changing the focal length will not affect the point of view, or perspetive. The only thing it will affect is how much of the scene you see in the document window. To put it another way, using a longer focal length has the same affect as as cropping the image. Shorter focal length = more space round the top, bottom and sides of the subject, longer focal length = less space.