That is very interesting. If the rate of false positives "child-only matches" is so high then I also wonder how it affects the ethnic origin estimated in MH, although for my mother the estimate matches reasonably well the family history, although it still shows anomalies like a quite significant Anglo-Saxon ancestry. I did not manage to test my father so I estimate his ancestry by comparing my mother's and mine, basically doing a primitive phasing.
The comparison of different chips gives a very concerning information, frankly. I tested myself and my mother at FTDNA and later transferred to MH.
Thank you again Debbie.
