I am having an issue with the layered grid graph where units stack up at the top of a ramp, rather than moving down the ramp. I have included a picture of the issue and the current settings for the graph. I will provide any additional information on request.
Well, the paths look ok at least.
What script are you using for movement?
Try increasing the gravity in your scene, maybe they go off the ramp and then just hang in the air because there is no gravity.
I am using the basic movement script, except with rigid bodies instead of a character controller. If I move that trigger area so that it sits half on the slope and half on the high part they path down it fine. Which is what I have done now to make it work.