Green coolant floating on orange coolant?

[Banana S]

I took it to the dealership to do the flush & fill last week. I do a lot of preventive maintenance myself, but the car is under an extended warranty, and given the fact that the cooling system runs the complete length of the car, I didn't want to risk missing an air bubble somewhere and getting a "hot spot" in a cylinder head at some later date. My peace of mind was worth the extra money to make sure it was done right, and it shouldn't need to be done again for another 5 years or so.