Karen, I apologize for not being more specific. That first referenced site is a summary provided by the site administrator which provides (1)"raw results" for each person tested, (2) their kit numbers & (3) their most recent known ancestors. The administrator also grouped those raw results into three major Kilgore branches each of which he considers having a relatively close genetic link. Those individuals tested can also refer to their personal page @ familytreedna.com & compare themselves to others who are a match or close match.If one has a match to a person with the same given surname of at least 34/37, you can be reasonably sure that you. share a common ancestor. Since those results are not available to those of us who can't be tested, the best we can hope for is to hopefully find someone in the data base with a common ancestor & use them as our surrogate to determine/confirm which branch & sept or sub-branch we belong to. Going back to the 2 references in my message- the first chart which you reviewed does not specifically tell you the number of mismatches between 2 individuals. You have to manually count these mismatches. The 2nd reference includes a wonderful table developed by John Kilgore that automatically does the "mismatch count" between each & every individual tested & lets you see how close each testee is genetically with every other testee. This is just my interpretation of all of these confusing numbers. Hopefully someone else can give a simpler explanation. I'm slowly getting self-educated on YDNA & still have to unravel the secrets & potential values of MtDNA. All I can say it's confusing but fun trying to understand. Jack