Because they have positive and negative feedbacks. And more importantly, the negative feedback left on their account by shorena is the most recent feedback they got (using default settings).
No, this is not unique,
xetsr is in a similar situation (to just name one example).
I also completely changed the trust score algorithm to this:
if there are no negative ratings
score = 0
for each rating, oldest to newest
if this rater has already been counted
continue
score += min(10, round_up(months since rating))
else
score = unique_positive - 2^(unique_negative)
if score >= 0
start_time = time of first negative
score = unique_positive since start_time - unique_negative since start_time
if(score < 0)
return ??? (orange)
move score to range [-9999,9999]
return score