I suspect you are making a math error.
What did you start season 4 at?
Or, since you know season 4’s end, don’t include season 4 in your 193/193/8 record.
Basically, (W - L) * 24 ~= rating change. You have to make sure that the W, the L, and the rating change all cover the same time window.
Friend me at Kaawumba#1133 (PC-NA) if you’d me to check more precisely.
P.S.
That forumula is approximate. See How Competitive Skill Rating Works (Season 14) for all the other things that can affect win/loss of SR.