Hello @its.kevin!
The token family consists of the original access tokens and refresh tokens as well as all the following tokens that are exchanged. If you start with AT1(Access Token 1) and RT1(Refresh Token 1), once AT1 expires and you use RT1 to get AT2 and RT2, AT2 and RT2 are added to the same family as AT1 and RT1.
Here is some documentationt describing the Refresh Token Rotation, please give it a read.
If you keep getting new AT1 and RT1, they should not be part of the same family.
I hope this helps!
Best,
Alex