I’ve been wonder how to solve this for a while.
What is…
Basically when I’ve divided the window up. The layer select buttons in each view are out of sync. So, for one window I have, 1+2+3, and the other I have 1+2+5, etc.
What I’m wondering is how do I sync these layers, so that each window shows exactly the same thing.

Lol. When posting this image I just noticed that lock next to the layers. Clicking it on solved my problem.