Two clips on timeline - I want to shift one, but they both move. ???

I have two clips of film of the same thing from two different angles. I need to move the one on the bottom to the right. Any time I try to move it, the top clip moves with it. I tried the Cntrl-Opt-P thing, and it shifted both clips up out of the time line. I tried the "hold down the tilde" thing, which let me move the bottom clip independently of the top clip, but the minute I let go, it went back to its original position.

This is the layout: https://drive.google.com/open?id=1IFsVfQE8ThvhjgQEUBOQn2rdG9lpGJws

Please don't talk to me about making a multi-camera sync from the browser (?) window; I have tried that over and over using this tutorial with these two clips, and it spits out one clip rather than two at the end and I give up on trying to make that tutorial work for me.