Object above camera is moving. Why?

I'm playing with the effect where you turn a static image into layers in Photoshop then export into AE. I have a simple animation set up where the landscape behind the yoga woman moves. That works the way I want it to.
But when I add the logo at the end it moves upwards with the landscape. I don't have anything keyframed, though I have the 3D icon checked because I was going to do a few things with the logo (fade in and spin).
Turning off the 3D option stops the logo drift, but I want to animate it without that drift. Missing something obvious?
