It's only natural for one's understanding of a concept or idea to grow with time. It's very typical to begin with misconceptions and to then outgrow those as you begin to better understand the concept. This is very common when it comes to Assessment FOR Learning. When teachers first hear that AFL will be a professional development goal for a school or system, they often have a very different view of it than they do after exploring the topic for a school year or two.
Sometimes it's helpful to analyze your previous misconceptions and realize how your understanding has grown. It's helpful as a self-reflection exercise, and it's helpful for individuals new to the topic to hear about the experiences of others.
Let's try doing that in this forum discussion. Share an early misconception you may have had regarding AFL, how/why that misconception changed, and what your new understanding is.