Whenever I add the Follow Path constraint to an object, that object is thrown far away from where it was.
In this example, I have a camera I want to attach to the outermost circular path:
As soon as I add the Follow Path constraint and set it to follow the circle, the camera is moved far away:
No matter what kind of object I use or how I configure my circle, the object is always thrown wildly.
These are my settings:
If I turn "Follow Curve" on, the camera is thrown to a different location. "Fixed Position" throws it to yet another location.