No, the Brewers would have a better overall intradivison record than the Giants if they both finish 30-30. The thing that might be messing you up is they both came into tonight with the same intradivision record, but for both to finish 30-30 it means the Brewers finished 2-0 and the Giants finished 1-1, thus the Brewers would move ahead of the Giants in the overall intradivision record.