First of all, sorry for the reply delay :/
In case you didn't solve this already:
I took a look at your effect, and I'm not sure I see the problem.
Both layers appear to have their ribbons scrolling just fine. What do you not see that you expect to see?
Just in case it's that: your "ProjectileNonWorkingScrolling" layer has no initial velocity, no acceleration in the physics evolver, and no other properties (such as drag and a wind field) that would make the particles move, therefore they all appear at the same spot, producing zero-extent vectors for the ribbon segments, therefore no visual geometry for the ribbon, unless you move the spawner around by selecting the root "Spawner" folder and moving the gizmo in the viewport:
Could that be it?
Hope this helps,