I thought few hundred. Last month got $9.56. April got $200++.
Is your 1% Everyday+ Rewards bonus interest as follow:
$200++ credited on 05Apr, $9.56 credited on 05May, $3.65 credited on 05June ?
Just making a guess since there is no other info provided by you.
Perhaps you should have rotated the funds out on 01April to another bank so that April ADB become 0 or very low, then bring back the funds on 01May.
The ADB for each month must follow a pattern of Low-High-Low-High-Low-High……… because the 1% bonus interest is calculated based on incremental ADB over the previous month ADB