Your posts look relatively harmless in my opinion… i don’t see any posts where you started a thread asking specifically for input on exam questions (which many people do), and the posts you made (which i can see) seem to be about more general concepts and it doesn’t look like you ever revealed new information… If you look at the examples that CFAI gives of people who have been punished for disclosing exam content, the disclosures included compiling vast amounts of information and publishing their findings across a variety of web pages, which is a much more blatant activity and understandably punishable.
I hope you don’t receive more than a reprimand, because it doesn’t appear that you disclosed new information. The fact that you are being investigated should be a fair warning to others on the forum that regardless of the nature of your comments, discussing CFA material immediately after the exam on public forums is dangerous, as your identity is acessible and the institute may interpret your comments differently than you had intended them to be conveyed.