I already knew I was correct as I did the math too after I posted
. I did forget about Fatima though which does put them only one difference. Then NOLA has 7 (& started with 4) so again not a lot of difference in it, but NCIS leads now & has had a major difference since it started.
(Not that it matters but Eric wasn't a main until after Dom stopped being one, from about the middle of the season so they actually started with 6)