How do you decide which Mixed Mode best fits you (illustrativeDNA)?

Hey, sorry for the random question, but I was just comparing mine and my parents' IllustrativeDNA results on Mixed Mode ancient and i've noticed my father has a lot of three-way combinations with Viking or Crusader, or other Germanic. Is this a substitute in the combinations for Slavic, or could it really be Germanic/Viking? How do you decide when you look at all the combinations which best corresponds to truth?

For example my dad:

https://i.postimg.cc/vZWZM4bS/image.png

My mother, on the other hand, has Gleb Svyatoslavovich on ALL 50 COMBINATIONS, at higher percentages, which for me indicates a stronger slavic/northern shifted than him (correct me if i'm wrong):

https://i.postimg.cc/brDq5Jmg/image.png

And then we get to me - I have Icelandic/Viking/Faroese/Germanic as one component in ALL my combinations. But I also have the Slavic. Why does it split them for me?

https://i.postimg.cc/SRsGb09D/image.png

Does it distinguish between both my parents' "northern" part of the DNA? Maybe it shows that even if I still account for around 50% such DNA, it isn't all like my mom's or my dad's? Or is it just trying to show I'm not so southern and trying to fit me best to some samples?