I've looked at Chromosome 20 on DNAgedcom for both my brother's download and mine. We both have triangulated groups occupying the same segment area on the Chromosome but my group, all in common with each other and me, don't appear on his Chromosome 20 and vice versa. In his download there's another group all in common with each other and with him. Does this mean that the two groups came from different parents or might they both be from the same parent?