I don't see why it should be called smart match. I have childen that are dead having a matching rate of 79 with a person that has lived to old age and have children.
I notice that sometimes as well. Sometimes I have matches between people who don't even have the same name. It also doesn't know "numbered" names vey well either. Such as if there is a John I, John II, and John III. More often than not, the program will match the three with each other. Like matching John III with John I and John I with John II. That must be a design flaw.