There are more odd numbered days than even (31st May and 1st June in succession for example), but they're still dishing out two days in succession in random places anyway.
Further silliness can abound as people with multiple vehicles in the same household could take advantage of it (provided they presciently bought both odd and even of course).
C-19 is a bureaucrat's dream, so not surprised at all this. Expect more in the months and years to come.