Why is the camera drifting when following a path and tracking an object? Is it possible to put a camera on a path and maintain it at a 1:1 ratio? what I mean by this, is if you look at the image below, it sort of drifts when rotating around..

I have it tracking an empty in the middle of the bed frame.

An example of the drift I'm on about: compare the camera location in the view port on frame 1 compared to frame 70, u see how the camera kind of moves away from the nurbs?



Thanks
You have two cameras on the scene.

You have a marker in the timelilne that controls switching the active camera to camera.001 as the active one at a certain frame.

On the second camera you have a different kind of animated motion. 

You can delete the marker or disable the 2nd camera for rendering. You disabled the visibility of it but not the renderability (the camera icon)