I think you are supposed to get a transcript for any place you took *any* classes for credit. I had to request a transcript for 1 class I dual enrolled in during high school. So I would suggest starting the process of getting that transcript pretty soon.
Yes, I agree. As long as your application is complete with an LSAT result, you can email or call them and request that your file be reviewed with the current score.
I don't believe the title of your recommender matters much as long as it's not a relative or someone along that line. That said, content carries a lot more weight. You want someone who can speak strongly to your abilities.