DBS - lack of common sense

When I pay salary to my employees using DBS internet banking, DBS asked me if they are all DBS accounts or some are not.

Apparently, if all are DBS accounts, the transfer can be made within one day. If any of the accounts are non-DBS, it will take 4 days.

Surely, DBS does not need to ask this question. They can check if the account is DBS or not, using the bank code.

Even if the accounts are mixed, the common sense approach is to transfer the money to DBS accounts within one day, and to non-DBS accounts within 4 days.

But common sense is lacking in Singapore. Sad.