Sarah Meyer writes, “Count the generations back to the siblings on EACH side so if on your side it is 4 and on the other side it is 3, the smaller number is the cousin - in this case 3 and the positive difference is the removed (4-3)=1. It does not matter whose number is smaller.So in this example the relationship would be third cousins once removed(my underline). If the numbers were 2 and 5, it would be second cousins 3 times removed.”
As I read Carl’s original post, if he counts back to the siblings as Sarah suggests (and would give the correct answer), then it is 3 on Carl’s side and 2 on the other.As ancestry correctly stated, second cousins once removed (2C1R).