Spiral expression + camera

Hiya,

Having some issues with a premade expression for a spiral as seen below;

shrink=time+1
radius=1000
angle=time*10
x=radius*Math.cos(degreesToRadians(angle))
y=radius*Math.sin(degreesToRadians(angle))
//z=0 // no depth
z=time*10 // with depth
centre=[640,360,0]
add(centre,[x,y,z])

I want to use the spiral for my motion path for the camera. Everything works fine in it's own comp when trying it out but if I create a new light in my main comp with the expression the light/emitter is going off-track from the spiral as seen below;

http://imgur.com/Sc51CfN

Anyone?

https://imgur.com/QSyN6mD

These are all the layers.
Pre-comp layers contain images with their own adjustment layers and Holomatrix effect, nothing more.

I guess I also could make a circular mask, make a Null to follow path and pair camera to it's position for X+Z and increase Y over time to get about the same result.

No difference.

However I copied everything from my Main comp over to the test-comp for the spiral for expression-edition visualisation and the light/emitter moves fine. Guess I'll just continue my work in that comp instead then.

Ok, that would certainly cause this issue.

Two ways to avoid the problem:

1) Switch the y and z in the expression so that you get the motion along the correct axis or

2) Rotate the camera 90 degrees around the point of interest instead of the Particular World