Here is my take:
Both products are compatible with each other. The cool coat adds ceramic oxide particles to reflect heat back. The main slurry is epdm in either case, plus the titanium dioxide and zinc oxide added.
I would just apply another coating of the cool coat and call it quits.
Hopefully you cleaned and prepped the roof per their instructions. A light mix of TSP/water is a good choice.
Get a good night's sleep.
Check back and let us know what they suggested.