3.5% from MBSB for 1 year FD with monthly interest..?

Anyone MBSB matured recently having different amount of interest amount credited?

1 matured (RM22.5K) on 4 May got RM627.23
1 matured (RM22.5K) on 8 May got RM617.05

I thought the interest rates are fixed?

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Here’s an exclusive offer that you can be proud of as an allianceonline mobile user. Earn 3.15% p.a. interest rate when you place a 3 months e-Fixed Deposit (“e-FD”) with a minimum placement of RM5,000. Sign up today!
Here’s how:

Campaign steps
*As the last step allianceonline mobile registration, perform a balance inquiry at any MEPS-enabled ATM within 3 days (only applicable for new allianceonline user).


This preferential interest rate is available for a limited time only so don’t miss out.
Campaign Period: 30 March 2020 to 30 June 2020

Terms and Conditions apply.

3 months 3.15% ..promo for alliance online banking app user.
U need to dl the app. The TnC refers to 'selected customers' who will receive a promo code on the inbox when u log into alliance online. No definition of the bank selection criteria.

The code is for 1 x use only. Tried to place 2nd time...tak holeh
Try and see if you can open this TnC document

https://www.alliancebank.com.my/Alliance/me...MPAIGN-16042020
.
Place eFd via Alliance online (not the online app)
.there's a dropdown to enter promo code after select 3 month tenure. Then u can see the 3.15 % rate

Affin website so useless one. Cannot even get in    

MBSB online can get in but outward online transfer limit to 9K only