Here’s an example from my matches to illustrate my question: I have a Y67 match with GD=5, and the FTDNATiP tool gives a TMRCA 8th generation probability of 47%. At the Y111 level for the same matched individual, GD is 7, and TMRCA 8th generation probability is 42%. Shouldn’t the Y111 probability have increased instead of decreased, since there was only a 2 mutation difference in the additional 44 markers in the Y111 test?