No, they haven't LITERALLY admitted that, in their posts I quote below. Fucking English, how does it work?
They were libeled/bullied into proxy bullying ME/micromanaging MY trust page - removing honest ratings in accordance with the feedback page's instruction that Positive="or had a successful trade". Well guess what? I'll change my freely-given ratings when the feedback page no longer instructs me to do so, and makes Neutral ratings for "had a successful trade", rather than Positive.
The problem is not you but them! They knew they will get positive feedback if they trade with you, You are not the problem right now, Their intentions are.