Since there is no valid definition of 'score' in dominion until the game ends, when you say the score was 27 to 24 then under the common interpretation which is the one salvager uses, it means 'if the game ended now' the score would be 27 to 24, which is not the case. Also, if you want to only count things in your deck the 2VP from each island does not count either as they are not in your deck and you only get point for victory cards in your deck at the end of the game.