Just after you post a new issue via the WPMU dashboard, you might have additional information to add.
I just tried to access my lastest post to add some information and the message you get is:
"No Responses Yet"
but the issue is THERE IS NO RESPONSE BOX!
If you want to clarify/ add additional information it then FORCES YOU TO WAIT until there is a response to clarify - and probably save someone's time.
There is a way - immediately after you have made the post IN THE DASHBOARD - to click and add to the post...BUT if you make another post, that link has GONE.
Not a user-friendly process, folks.