Yep, same on my father’s side of the family. A set of siblings married a set of siblings. So everybody descended from those marriages is everybody’s cousin in several ways. Sounds incestuous, but it’s not.
On my mother’s side of the family, her two brothers, identical twins (married to completely unrelated women), and a whole bunch of kids between the two of them. So we’re all (that bunch of kids and me and my siblings) first cousins, but apparently some of them are more related, genetically speaking, than me and my siblings. Funny. Never thought of that before. I wonder if the cousins have? I’ll have to ask next time I see any of them.