-snip-
I am not sure why your trust score shows as zero when you have so many positive ratings. My interpretation of how trust scores are calculated means that your trust score should increase by 12 points every month. Maybe theymos can comment as to why your rating is not 100+ that it appears you should have. (The formula is somewhat complicated ) - he can comment if he wants to but I figured it out. When you have a negative rating, only ratings since after your first negative rating are counted for your trust score.
-snip-
Doesn't that mean if someone receives a positive and a negative rating, they'll go negative if the negative is newer?
If someone has 1 positive and 1 negative, then the time doesn't matter. They'll have a score of -1.
Examples:
Old -> New
+ - : -1
- + : -1
+ + - : ???
+ - + : 0
- + + : 1
+ + + : >=3
- - + : -3
+ - - : -3
- - - : -8
-snip-