I wouldn't be surprised if Samantha's liver values come back abnormal. Liver disease is genetic in Yorkies. In fact, Yorkies are 36 times more likely to be born with a liver shunt than all other breeds combined. Since you got Samantha from a pet store, she came from a puppy mill. Puppy mills don't do any health testing and regularly breed sick dogs.
Can you update us when you hear back from the vet with her CBC results? Did they do a bile acids test?