Please note that the Summary table can be misleading, since the criteria for winning the ISS is:
The winner of the Interstate Shield is the State Team scoring the most test points, but:
a) if test points are equal, the team that wins the most net matches in all tests;
b) if net matches are equal, the greatest number of net games in all tests;
c) if net games are equal, the greatest number of net points in all tests;
d) if net points are equal, the winner of the test between the teams - if this test was tied, both State teams shall share the trophy.

The important point is that the second criterion is net matches, not total matches (which the Summary table uses as criterion 2). Ditto re net games & net points....