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Not 30 days yet - and regarding the same bucket thing, SBD Savings only has one option, "Withdraw SBD", so it would be difficult to make a transfer without first doing the 3 day wait for withdrawal.

The transfer has to be into or out of the same bucket, be that liquid or savings SBD. If it didn't get paid interest for a transfer in the same bucket then it probably hasn't been 30 days since the last interest payment.