I'm confused. I took a practice test in the book 10 new actual, official LSAT preptests.

I took and scored a test according to the book and got a 166. But when I put my answers in the 7sage calculator it says I got a 162. I went back and checked and it has the exact same questions marked wrong and no new questions marked wrong.

What's up?

Have you guys found it normal to have super varied scores? My first test after taking the course I got a 165. The next test I took I got a 155, then a 157, and now back to a 164.

Any suggestions?