I do understand what you're saying ... but (for example) at 10 generations, Poncho is 15% Dibo ... and Big John is 0% Dibo ...

But at 14 generations Big John is 7% Dibo ... so Poncho and Big John (at vastly different points in their pedigrees) do share Dibo a bit ... but that doesn't mean they are even remotely related.

Hope this makes sense.