Both myself and my aunt have done the FTDNA Family Finder (autosomal) test. If I look at the list of ICW matches for person A I get a list of 21 other tests. When I look at the matching segments over 5 cM for these 22 people I get 20 of them, including my aunt, matching on chr 18. The segment for all of them ends at the same locations with three matches starting earlier then the rest.The segment is 8.51 cM for most of the matches with the largest of the other 3 being 14.37 cM (my aunt's results).
However, when I look at all my matching segments I find I have 5 other matches with segments that overlap or are contained within the segment of the others. Four end at the same location, two start at the same location of the majority of the other matches, while one overlaps at the start (8.22 cM) and two are smaller then the majority (7.51 cM)
All segments are over 700 SNPs.
When I look at the ICW for person B who is included in the ICW list of person A, it includes all those who were ICW with person A plus two additional people out the five mentioned above.
My aunt's ICW includes all those from A and B, plus two of the others.
Looking at the final person (C) with a matching segment, they have no other ICWs at that location.
So how do I interpret this? Is a 7.51 or 8.51 segment large enough on its own to be considered as matching (ie included in the ICW list)?
I presume person C would be on my mother's side, as my aunt is on my father's. But if all the rest are on my father's side, why are some of them not included in the other's ICW list (ie. A has 2 fewer then B who has 2 fewer than my aunt!).
Hope this is not totally confusing and that someone can explain what is happening or point me to some appropriate information on the subject.