Surely if they know that their systems have deleted registrations by accident then they should be explicitly clear about the issue in their communications. The statements they have put out infer that people thought they had confirmed their registrations but later found out they weren't registered.
Some people will still think they have registered properly and if theirs has been deleted then they will still be disappointed in 2 weeks time.
I uploaded a new photo and confirmed my reg, got all of the emails and was able to look it up and view it. I have done the same today and I get the email saying 'the following reg is valid' but when I click the link, I can't seem to view or delete it. Is this just because the registration is closed? Usually you can at least view the registration.