No idea. It's puzzling. From memory, I think NIST used SAP2000 so I would have thought it would be a doddle. This is one of the items I need to find out by re-watching Hulsey's vids. Tech issues? One possibility is that they used ABAQUS which might not have a good post-processing module - I don't know since I haven't used that s/ware, even by proxy.
Meanwhile it would be interesting to find out about Mike West's background and why he doesn't doesn't 'speculate'. Do you know anything about him?