Coolant flush & fill by Dealer now oily coolant leak?

[6.7 Powerstroker]

The week before last I had my local Ford dealership flush and fill the coolant before going out of town. Today I remote started the truck and when I went to get in I noticed a small 2" round coolant/oil leak on the ground. At first I thought it was oil due to the slickness but it was really clear and my oils not been changed in about 5k miles. So after looking at the engine bay trying to see where it's coming from I thought maybe coolant from the coolant pump or somewhere around it. But after running it for awhile I can't get any more coolant to come out. Now I'm starting to think maybe the evaporator coil and maybe that was the oil leaking out. So my question is is there anyway the flush and fill could cause damage to the evaporator coil? I also noticed the side engine hex head plugs that would need to be removed for a flush and fill looked to have not been touched and of course right after the dealership service this started. I do plan on taking it tomorrow to have them look at it but I just want to know if there's any correlation between these 2 systems?