I was surprised too. How you get on the Default trust 2 trust list is because someone on the default trust 1 lists manually added you on their trust list. I went ahead into my trust setting, picked heirarchy view and found out that a user named tmfp placed you on their list. You can be removed from DT2 if one more person in DT1 decides to exclude you than put you on.(Or the people who orginally included you remove you from the their trust list) It appears that your name came up in the discussion about the new changes is a list here. https://bitcointalk.org/index.php?topic=5095156.645 Some people are questioning why certain members are now in dt2 with no trust feedback history.  Some pruning is probably going to take place in the next few days. It's up in the air if any of us on the dt2 list will be on it for very long.