I've had some similar issues over the last week or so. Supposedly the being able to list and clear has been fixed from the hardware/software side but there are still some agents who are either unwilling or unable to learn and remember how to do it properly. I carry a few of the forms with me now and anyone I'm jumping with or who is trying to get on a flight I'm working is welcome to one.
Funnily enough, I had an agent pull the "CASS is down" line on me not 6 minutes after having cleared security through the KCM line. When I mentioned that, another agent was able to "miraculously" coax the CASS servers back to life. Gotta love it. I told her next time, not to lie. If you don't know how to pull it up, just tell me and I'll go find someone else who can do it. There is no shame in admitting defeat, only in lieing about it