I didn't quite understand your question, but if the problem you are describing is not being able to unmark it as assumed, you can select a correct answer and then unselect it to put the question back in the default state. This idea touches on that issue, but it does not look like Jive is going to change that behavior:
Also, just as an FYI if you mark and unmark answers I think there is an issue where they do not get reflected properly in CMR.
Thank you so much! I marked 'Correct Answer' and then unselected it. The discussion thread went back to be a question!