"You can cheat on compatibility, can guess what you're going to find out about yourself if you guess A, C or whatever, but this is actually science," Smith-Adair said.
When the results came in, Blount and Smith-Adair learned that had a 10 percent genetic compatibility.
"They didn't explain this at all," Blount said. "I really want more information about the science here. I don't get what any of these numbers mean."
Blount and Smith-Adair did get a 75 percent emotional compatibility score, a score they thought should weigh more heavily than the genetic score.
Happily married for five years, Maria and Taso Pardalis took the test and learned they had a 75 percent emotional compatibility and, what the company calls, a nearly perfect genetic compatibility of 98 percent.
"It's good to know," Taso Pardalis said. "I'm glad I know."
"Well it's good, also because we have two kids so that means they have a good genetic makeup," added Maria Pardalis. "Obviously I'm very happy."
Watch the full story on ABC News' "Nightline Prime," Saturday, June 28, at 10 p.m. ET.