I'm following the tutorials for using the animated prop editor, and created one prop- a car moving from one side of the screen to the other. It attached to the Action Menu, no problem. Worked ok. 

Went to make some more, and they don't work. Same steps. The name of the action appears, but when I execute it there is no movement. I notice I can move it using keyframe animation on the transform layer, where keyframes appear. But no keyframes appear on the motion layer. I have a feeling I switched modes or something.

Probably a dumb error, so I'm apologizing for the newbie question ahead of time!

Anyone got a clue to what's going on? What did I do? Using Pipeline.