When the comparisons between two BigY results are presented and the difference is only 1 or 2 variants the system has a strong tendency to populate the displayed list of differences with an additional 1-2 dozen variants where the ancestral and derived values are the same. Please, please stop displaying these invalid results!
FTDNA should run a script and purge the BigY result tables of all of these entries if they are present.
FTDNA should run a script and purge the BigY result tables of all of these entries if they are present.