F3-analysis of Botai-culture gives contradicting results

The Botai culture was an ancient culture which lived around 3500 BC in Kazakhstan.

https://en.wikipedia.org/wiki/Botai_culture

Some researches state that horses were domesticated by this culture. The recent study, Damgaard at al. 2018, published three samples of Botai culture.  There has been some discussion about a genetic link between present-day Saami  and Botai people, seen by IBD-segments on public Gedmatch service.   IBD-statistics however has a shortcoming in analyzing ancient samples, because a) IBD-segments become mostly random after around 1500 years and b) ancient samples has usually too low quality to form usable IBD-segments.  However,  my f3-statistics show high common drift for Saamis and Botai samples.  This similarity seems to continue in Finland and Scandinavia,  but in lesser amount  in Mongolia, which probably means an artificial effect between Saamis and Botai samples, generated by a coincidentally similar admixture of Siberian and ancient Steppe cultures in both populations.

 

 Update 24.5.18 11:30

Here are two updates, the first one listing Botais' top ten of modern populations and the second one the top ten of ancient populations.  I hypothesize of Botais' admixture that is is mainly similar to West-Siberian Hunter Gatherers, with a lump of Eastern Hunter Gatherer admixture, reasoning this by two top matches of ancient populations. Obviously the Eastern Hunter Gatherer admixture ties the result with Fennoscandinavia. The influence between WSHG and EHG is interesting and calls for more study.