When ancestry give a likely relationship, it's based on the number and size of DNA match(es). It's not a guarantee but a guide to allow you to figure out if it matches what you know from regular genealogy. Thus I have first cousin once removed which (using the GEDmatch info) should be 2.5 generations, but is actually 2.3. This can just be because of random flux or because there is more than one line of connection. And as far as DNA connection cousins and uncles/aunts and direct ancestors are somewhat interchangable; the known (or suspected) genealogy should let you figure it out.