This is part of an annoying and, to point hackers, inconvenient trend by almost all banks and credit card issuers to extend their exclusion periods. You can read more about it, including the ANZ changes, in the article below.
From that link, it mentions Westpac, plus the 3-St George banks. Are all 4 now treated as one? OR is it still Westpac on one lockout cycle and the 3-St George banks on a 2nd lockout cycle, as I have always experienced thus far?
Westpac also recently extended its offer exclusion period from 12 to 24 months
The same 24-month exclusion period applies to St.George, Bank of Melbourne and Bank SA customers. All three of those banks are owned by Westpac and offer the same credit card products as each other.