Bug: y and z axis are flipped
I've changed the position of the red item by a positive value for both x and y coordinates, and by a negative value for the z coordinate.

As you can tell from the red-green-blue xyz reference system, After Effects incorrectly displaces the red object in both y and z directions. It looks like the y axis is pointing downwards and the z axis inward.
This reference system is in opposition to what is drawn on screen.
Therefore one or the other needs to be fixed, if I'm interpreting this correctly.