Eventually clocked the wordplay for my LOI 23a, just to confirm the entry I already had. Then joined {prospero@9 appria@21} in not getting any acknowledgement of my entry. The screen just returned to the previous page. The trouble is, that's just what it did when I then tried submitting an invalid entry: email address and no answers. So Any suggestions or feedback yet? I don't know whether the system disqualifies you if you make what turns out to be multiple entries or is more intelligent/tolerant.
Is the registered email address always the same as the one of your Guardian account?