I think it's because your ADB for Jan is lower than your ADB for Dec.I think ive missed out on bonus interest on 31 Jan? Did you guys receive?
I usually get the following interest payments:
30 Dec CR INTEREST
30 Dec BONUS INTEREST PAYMENTFOR THE PERIOD 2023-12-01
12 Jan
EXCLUSIVE BONUS INTEREST PROMO INTEREST FOR DEC2
But this time ive only received these interest.
31 Jan CR INTEREST
14 Feb EXCLUSIVE BONUS INTEREST PROMO INTEREST FOR JAN
I was on the #s23 exclusive bonus interest(sept 2023) promo
the 31 Jan Bonus Interest is paid based on incremental balance from preceding month, whereas the 14 Feb Exclusive Bonus Interest is paid based on total balance on account (after minus the 31 Jan paid amount, if any).
if you add up the two interests on 31 Jan (0.05%) and your 14 Feb interest, they should total to 3.6% (assuming that is the rate you're supposed to enjoy based on the Sep 2023 promo).