I'm going to a different shop and getting a 2nd opinion because mine seems a little excessive, but I'll find out for sure Friday
they either dragged the tint on your interior or didnt do a good job cleaning.
If the shop cant do the rear 1 piece please find another shop. A more experience tinter can only do the rear.
take a picture of your CHROME trimming before you drop off the car. (tinters have to trick your windows to activate up, they might accidentally close your windows and hit the chrome piece.) ive seen this done many times!