I thought I'd done this once and knew how to make it work. Unfortunately I think I'm missing something about this problem.
In the example, I have 2 layers.
Layer 1 has a parallax of 100
Layer 0 has a parallax of 50
Each layer has a simple sprite placed at x:500 and y:500.
What I'm trying to do is (on layout start) offset the position of sprite_50 so that it appears to line up visually with sprite_100 at the start of the layout.
Ultimately, I intend to offset numerous objects on various background layers each with different parallax values. I'm not sure, but I think what I'm trying to do involves parallax origin. I've done some searching but wasn't able to find anything that helped.