Kelley, the width of the rim light in the objects folder (which is why the project was needed) is about 1600cm! Five cm is the default. That either tells me that the scale of your models are huge (which could account for slowness?) or you might be changing the settings in the light instances.....which could be why they're not matching.
Anyway, here's what I get from dragging in two instances and adjusting the settings in the "main rim light". The volumetrics was already set to ON by you.