A relative in 2009 took a DNA test on 23AndMe, which stated he was R1b1b2a1a2d3, found among Celts in Northern Ireland 500 years ago (although there were no "Celts" 500 years ago)...
On World Families (which is no longer running) they told me it was Alpine Celtic, R1b U152, so for almost ten years I thought I was Alpine Celtic/Roman....
Then, another relative (and I think the U152 relative), both took the DNA test in 2017 on Family Tree DNA and are listed as R1b DF19 which was discovered in 2011 as a new subglade.
Were they listing people as U152 back in 2010 who were actually DF19 since they seem to be closely related, both being descended from P312......?