I think part of the problem is we don't know enough detail, because not enough detail has been provided. Reporters have to work hard to exact any details during the press conferences. It sounded like seagulls on a beach today in that media conference, with them all calling out questions at the same time, trying to be heard.
If we had 12 cases every day and we are told all are locked away, none of them has been interacting in society physically, Id be feeling highly confident for L2, as these cases are effectively zero cases. OR, we get 1 every 3 days, and we hear that each one has spent x days in society, physically when infectious. Thats a different story. Bit all i know is we got 0 or 1 or 3 cases, thats all I know. All I can do is assume there are bugger all out there.