everytime I get my car for my dealer I like to check all around the car to see if there any damage and also check if they done any mileages with it so I put my trip computer to 0 KM, cause I know some dealer not Ford especialy who use customers cars to go home or do shopping with it and even make new customer try the car without the owner no about it!
For the mud stain u got the right reaction I would have done the same! Now ur car is back I hope everything will be back to normal!!