VROverlay placement problem with Quest.

We're developing a game in Unity for the Quest. We're trying to use the OVROverlay sample as a basis for loading screens and the like and we're having a problem with visual placement. We can send things to the overlay, but in when in the headset, the overlay always appears in the upper right quadrant of the screen. Attempts and moving the overlay around has only resulted in the image in the upper right corner moving around within the upper right quadrant. 

Sooo.....

1) Anyone have this problem before?

2) I _thought_ our positioning code is correct, but maybe we are misunderstanding something. What is the correct way to set the position?