I have had a few instances where cousins married with children. In every instance one of the cousins, no matter how distant, and all relatives will show up as "sister/brother" "husband/wife" "cousin" of and all other relatives after that will not show as being connected to the family even though they clearly are.
This is just one example, there are others like this in my family tree.
Assistance appreciated.
Crist Middaugh