Actually some schools drop the lower LSAT score if they see a significant increase in score, which is just like your case.
I'd call the schools up and mention the scenario. Again, although many schools average out scores there are some good schools that take the higher one on the condition that there is a drastic improvement.
The question now I HAVE to ask you is how did you get a 10 point jump in about 1 1/2 month time? What did you do? How did you study?