You are trying to figure out how each of the law schools to which you are thinking of applying will view your multiple LSAT scores. There is no set standard for this and you will need to research it for each school. There are two very helpful resources to help you.
The first that I recommend is the NAPLA/SAPLA Book of Law School Lists written by Edward Stern and Gerald Wilson. It compiles the results from self-reported surveys and gives a very good break down of law schools and their responses to how they use multiple LSAT scores (you will want to reference pages 366-372). You will see from the examples below that the majority of law schools tend to use the highest score but make it clear that they do review all scores:
American University Admission Committee reviews all scores, but typically considers higher score for admission purposes.… Read full post