There is a huge difference between new infections and new cases. It seems clear that the Western Cape leads in the number of cases, due to screening and testing protocols (and fast turnaround), while other provinces are living in fools paradise.
IMO it is pretty obvious that there will be close to 3000 new infections by the end of May. However any definitions which rely on 'official' case numbers will be fatally flawed. Basing district level restrictions on those numbers just compounds the folly...