They should only subtract the exact amount pts that you earn from daily sign in from 30 Days.
I look at Daily Check-In and I never got any 19 SS PTS, but on Consume History Expiration the number dont match.
Since Expiration is 4-17-2018. Then we have to look at Deposit History of 3-17-2018...Come on 30 Days xpiration.
I only earned 10 SS Bonus on Daily Check in 3-17-2018. But I lost 132 SS in 4-17-2018