Having trust score of
0: -0 / +1 really not possible.

Why wouldn't it be? The "trust score" increases with time. A positive feedback (made today by Hhampuz) isn't going to score you any trust score. That's why the first digit is a 0.
Possible meh?
I though when someone got positive feedback from DT member they must attain trust score as well,atleast one.Because on many cases I have seen people with 1: -0 / +1 , but no profiles with zero trust score while having positive feedback.
Initial trust score after getting the feedback remains 0, it gets +1 after each 30 days passed.
Read more here-
https://bitcointalk.org/index.php?topic=5069647.msg47920887#msg47920887
Liked how people are getting into custom trust list. Lately, it's working. Maybe after couple of months people will be more aware of it and build custom trust list.