Ajv70 appears different from Ajv52 who in the previous analysis appeared to be of mixed ancestry between what appeared to be a Saami like and a Baltic like or Eastern European like population. Ajv70 on the other hand in large cluster with Saamis, Vologda Russians and Mordovians and in particular with Saamis.
The low affiliation for Ajv70 vs the Mediterranean populations on the heatmaps is only matched by Saamis and Finns among the modern populations. Finns appears more influenced by Eastern European populations and Scandinavians than the Ajv70 while Vologda Russians and Mordovians appears more influenced by Eastern European populations. Saamis show less affiliation to Scandinavians and Eastern Europeans than both Finns and Ajv70, but Ajv70 heatmap profile do seem to resemble the Saami most.
For the same reason Ajv70 would not cluster with Saamis and Finns on the PCA plot even they do cluster on the heatmap and else shows very similar profile with Finns and especially Saami. The explanation would therefore be that Ajv70 was not part in the founder effect that made the modern day Saamis and Finnish cluster due to closer relatedness to each other and therefore Ajv70 appears among the next best they could cluster with, the Scandinavians on the PCA plot (In earlier linked analysis Scandinavians shows both Saami and Finnish admixture) compared to continental Europeans so it would make sense.
Second about "dissimilarity" and "similarity" vs external influences or "Others". In dimension 1 and 2 vs the "Others" (the rest of the world panel) we seem to catch variation that could also explain why the Ajv70 heatmap clustering also include Mordovians and Vologda Russians even the European PCA dimension 4-5 do not support this clustering.
Conclusion: Ajv70 appear to have the most similar heatmap profile to the Saamis but this individual do not seem to have been part of the same founder effect that made the higher genetic sharing between modern Saamis and Finns and therefore do not cluster together with the Finns and the Saamis on the PCA instead making Ajv70 cluster "incorrect" with their closest neighbors Scandinavians. Ajv70 neither show any significant degree of influence from the Baltic or Eastern European populations like Ajv52 who made Ajv52 appear to shift away into open space from Ajv70 position among Scandinavians closer to the Eastern European populations. The Ajv52's clustering with Scandinavian-Saami mixed individuals when adding some Baltic like admixture seem to further support that Ajv70 mostly resemble a Saami like population. Next it would make sense to check if Ire8 may have been part of the common modern Saami-Finns foundereffect. Earlier analysis may suggest it to certain degree.
Edit 19/11-13 broader overview with more European and Middle-Eastern populations. It is again very clear that Ajv70 cluster with Uralic or earlier Uralic populations and especially the Saami.