One of the most excluded DT1 selected members?
Sorry If I didn't get you right, but he is not even on DT. So how did you come up with the conclusion that he is on DT1
He's qualified to become DT1 member because there are 10 users trust him, he also met some other requirements e.g. active. But currently he's not in DT because there are more users distrust him than the users that trust him.
Small mistakes like?
I think it's related with retaliation or personal hate feedback, some DT members will give negative feedback to those accounts with trust abuse as the reason.