Are you referring to your sent ratings or received ratings? Your sent trust ratings will have nothing to do with your trust score. You could never send any trust ratings but still have a high trust score because you receive a lot of positive trust ratings.
Can you explain what you believe the difference between being on the default trust list and having your ratings visible on the "default trust tree" are? I am fairly certain this is just two different ways of describing the same thing.
I am talking about the fact that most of the trust ratings I have already received have now been made invisible by anyone on the entire default trust tree UNLESS they explicitly add me to their trust list. If some one already trusts me, what good does it do to have my trust score show for them? They already know I can be trusted. So in effect from the perspective of the VAST MAJORITY of the users on this forum, my trust rating is at about at a quarter of its former visible score, in effect punishing me by taking trust ratings from me that I have already earned by preventing them from displaying in my visible trust score number.
Play with your trust list, try adding me to your trust list and removing me along with removing the default trust, or anyone on level 1 default trust. You will see the massive difference.